Democratic presidential candidate Hillary Clinton receives an endorsement from U.S. Sen. Jeanne Shaheen on Saturday, September 5 in Portsmouth, New Hampshire. <a href="index.php?page=&url=http%3A%2F%2Fwww.cnn.com%2F2015%2F09%2F05%2Fpolitics%2Fjeanne-shaheen-women-for-hillary%2Findex.html" target="_blank">Clinton attended a Women for Hillary event at Portsmouth High School. </a>
Democratic presidential candidate Hillary Clinton receives an endorsement from U.S. Sen. Jeanne Shaheen on Saturday, September 5 in Portsmouth, New Hampshire. Clinton attended a Women for Hillary event at Portsmouth High School.
Darren McCollester/Getty Images
U.S. presidential hopeful Donald Trump <a href="index.php?page=&url=http%3A%2F%2Fwww.cnn.com%2F2015%2F09%2F03%2Fpolitics%2Fdonald-trump-2016-rnc-pledge-meeting%2F" target="_blank">holds up a signed pledge</a> during a press availability at Trump Tower in Manhattan, New York, on Thursday, September 3.
U.S. presidential hopeful Donald Trump holds up a signed pledge during a press availability at Trump Tower in Manhattan, New York, on Thursday, September 3.
LUCAS JACKSON/Reuters/Landov
Campaign workers put up letters spelling "Jeb!" outside the site of a campaign town hall meeting with U.S. Republican presidential candidate Jeb Bush at the VFW post in Laconia, New Hampshire, on Wednesday, September 3.
Campaign workers put up letters spelling "Jeb!" outside the site of a campaign town hall meeting with U.S. Republican presidential candidate Jeb Bush at the VFW post in Laconia, New Hampshire, on Wednesday, September 3.
BRIAN SNYDER/Reuters/Landov
The newly renamed Denali, top center, is seen from a window of Air Force One on approach to Anchorage, Alaska, on Monday, August 31. <a href="index.php?page=&url=http%3A%2F%2Fwww.cnn.com%2F2015%2F08%2F30%2Fpolitics%2Fobama-alaska-denali-climate-change%2F" target="_blank">President Barack Obama changed the name of America's highest mountain from Mount McKinley</a> at the opening of a historic three-day trip to Alaska aimed at showing solidarity with a state often overlooked by Washington.
The newly renamed Denali, top center, is seen from a window of Air Force One on approach to Anchorage, Alaska, on Monday, August 31. President Barack Obama changed the name of America's highest mountain from Mount McKinley at the opening of a historic three-day trip to Alaska aimed at showing solidarity with a state often overlooked by Washington.
Andrew Harnik/AP
A supporter of presidential hopeful Sen. Ted Cruz holds up a sneaker with Cruz's likeness on it while Cruz visits with supporters during a rally at the Fort Worth Stockyards in Fort Worth, Texas, on Thursday, September 3.
A supporter of presidential hopeful Sen. Ted Cruz holds up a sneaker with Cruz's likeness on it while Cruz visits with supporters during a rally at the Fort Worth Stockyards in Fort Worth, Texas, on Thursday, September 3.
Andy Jacobsohn/Dallas Morning News/Corbis
Secretary of State John Kerry delivers a speech in support of the Iran nuclear deal at the National Constitution Center, Wednesday, September 2, in Philadelphia.
Secretary of State John Kerry delivers a speech in support of the Iran nuclear deal at the National Constitution Center, Wednesday, September 2, in Philadelphia.
Matt Slocum/AP
Vice President Joe Biden poses for a selfie with supporters Wednesday, September 2, at Miami Dade College in Miami. Vice President Biden traveled to Florida to support Senate Democrats and the administration's education agenda.
Vice President Joe Biden poses for a selfie with supporters Wednesday, September 2, at Miami Dade College in Miami. Vice President Biden traveled to Florida to support Senate Democrats and the administration's education agenda.
Alan Diaz/AP
A fish apparently spawns, relieving itself on U.S. President Barack Obama as the latter meets a traditional fisherman on the shore of the Nushagak River in Dillingham, Alaska, on Tuesday, September 2.
A fish apparently spawns, relieving itself on U.S. President Barack Obama as the latter meets a traditional fisherman on the shore of the Nushagak River in Dillingham, Alaska, on Tuesday, September 2.
JONATHAN ERNST/Reuters/Landov
Republican presidential candidate Sen. Lindsey Graham hugs his sister Darline after filing for the South Carolina presidential primary, Tuesday, September 1, at the GOP headquarters in Columbia, South Carolina.
Republican presidential candidate Sen. Lindsey Graham hugs his sister Darline after filing for the South Carolina presidential primary, Tuesday, September 1, at the GOP headquarters in Columbia, South Carolina.
Richard Shiro/AP
Republican presidential candidate Wisconsin Gov. Scott Walker gives a thumbs up as he does a TV interview during a campaign stop at Bill Miller's Bar-B-Q on Wednesday, September 2, in San Antonio, Texas.
Republican presidential candidate Wisconsin Gov. Scott Walker gives a thumbs up as he does a TV interview during a campaign stop at Bill Miller's Bar-B-Q on Wednesday, September 2, in San Antonio, Texas.
Eric Gay/AP
Donald Trump's director of security and longtime bodyguard Keith Schiller holds back demonstrator Efrain Galicia at Trump Tower in New York on Thursday, September 3.
Donald Trump's director of security and longtime bodyguard Keith Schiller holds back demonstrator Efrain Galicia at Trump Tower in New York on Thursday, September 3.
Erik Pendzich/REX Shutterstock/Rex USA/Erik Pendzich/REX Shutterstock
U.S. Republican presidential candidate Sen. Rand Paul pauses while speaking at a campaign stop at the Airport Diner in Manchester, New Hampshire, on Wednesday, September 2.
U.S. Republican presidential candidate Sen. Rand Paul pauses while speaking at a campaign stop at the Airport Diner in Manchester, New Hampshire, on Wednesday, September 2.
BRIAN SNYDER/Reuters/Landov
Democratic presidential hopeful Sen. Bernie Sanders talks to Donna Winburn about signing a pledge to address climate change after speaking during a campaign stop in Grinnell, Iowa on Thursday, September 3.
Democratic presidential hopeful Sen. Bernie Sanders talks to Donna Winburn about signing a pledge to address climate change after speaking during a campaign stop in Grinnell, Iowa on Thursday, September 3.
SCOTT MORGAN/Reuters/Landov
House Select Committee on Benghazi Chairman Rep. Trey Gowdy walks down the stairs as he returns to a closed hearing on Capitol Hill in Washington on Thursday, September 3. The House committee investigating the deadly 2012 Benghazi attacks <a href="index.php?page=&url=http%3A%2F%2Fwww.cnn.com%2F2015%2F09%2F02%2Fpolitics%2Fbenghazi-committee-clinton-cheryl-mills-jake-sullivan%2Findex.html" target="_blank">interviewed a former top aide to Hillary Clinton, Cheryl Mills</a>, as the panel resumes its review of the 2012 terrorist attack in Libya and Clinton's use of a private email server.
House Select Committee on Benghazi Chairman Rep. Trey Gowdy walks down the stairs as he returns to a closed hearing on Capitol Hill in Washington on Thursday, September 3. The House committee investigating the deadly 2012 Benghazi attacks interviewed a former top aide to Hillary Clinton, Cheryl Mills, as the panel resumes its review of the 2012 terrorist attack in Libya and Clinton's use of a private email server.
Susan Walsh/AP
Honey Davis, of Onawa, Iowa, center, listens as Republican presidential candidate Louisiana Gov. Bobby Jindal speaks during a meet and greet with residents on Wednesday, September 2, in Denison, Iowa.
Honey Davis, of Onawa, Iowa, center, listens as Republican presidential candidate Louisiana Gov. Bobby Jindal speaks during a meet and greet with residents on Wednesday, September 2, in Denison, Iowa.
Charlie Neibergall/AP
Republican presidential candidate Gov. John Kasich waves as he arrives for a campaign stop at Robie's Country Store on Wednesday, September 2, in Hooksett, New Hampshire.
Republican presidential candidate Gov. John Kasich waves as he arrives for a campaign stop at Robie's Country Store on Wednesday, September 2, in Hooksett, New Hampshire.
Jim Cole/AP