Paul Ryan Paul Ryan

Voters line up to vote early at the Supervisor of Elections Office in Bradenton, Fla., on Monday. Multiple House districts in the state could flip for the opposite part in this election. Joe Raedle/Getty Images hide caption

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Joe Raedle/Getty Images

House Speaker Paul Ryan told GOP members Monday he will no longer defend Donald Trump and is instead focusing on keeping the House in Republican hands. Alex Wong/Getty Images hide caption

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Alex Wong/Getty Images

In a bid to bridge party divisions, Donald Trump formally endorsed prominent elected Republican leaders during a campaign rally on Friday, in Green Bay, Wis. Evan Vucci/AP hide caption

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Evan Vucci/AP

President Obama slammed Republican nominee Donald Trump as "unfit" and "woefully unprepared" to be president during a news conference with Singapore's prime minister at the White House on Tuesday. Pablo Martinez Monsivais/AP hide caption

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Pablo Martinez Monsivais/AP

NPR's Steve Inskeep interviews Speaker of the House Paul Ryan in the Speaker's conference room at the U.S. Capitol in Washington, D.C. Ariel Zambelich/NPR hide caption

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Ariel Zambelich/NPR

House Speaker Paul Ryan of Wisconsin meets with reporters on Capitol Hill in Washington on Thursday after his meeting with Republican presidential candidate Donald Trump. Cliff Owen/AP hide caption

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Cliff Owen/AP