First Read's Morning Clips: Trump Backers Vow Revenge on GOP

OFF TO THE RACES: Vowing revenge

NBC's Benjy Sarlin has a good rundown of how Trump supporters are reacting to the GOP exodus.

A federal judge in Florida has extended the voter registration deadline in the wake of Hurricane Matthew.

NBC's Ali Vitali has a readout of Trump's rally in Pennsylvania last night.

From the New York Times, on Paul Ryan: "The House speaker, Paul D. Ryan, dealt a hammer blow to Donald J. Trump's presidential candidacy on Monday, dashing any remaining semblance of Republican unity and inviting fierce backlash from his own caucus by announcing that he would no longer defend Mr. Trump… Effectively conceding defeat for his party in the presidential race, Mr. Ryan said his most urgent task was ensuring that Hillary Clinton did not take the helm with Democratic control of the House and Senate, two lawmakers said."

POLITICO offers the tick-tock on Ryan's decision, adding that the GOP leader could still decide to fully rescind his endorsement before Election Day.

House Democrats are starting to get much more optimistic about that House majority in the wake of Trump's new woes.

The Washington Post's lede: "The Republican Party tumbled toward anarchy Monday over its presidential nominee, as House Speaker Paul D. Ryan (Wis.) cut Donald Trump loose in an emergency maneuver to preserve the party's endangered congressional majorities."

Even Trump's most devoted supporters are starting to worry that he could lose, the Washington Post writes.

Don't forget: Early voting is ongoing, and it could be giving Clinton a major boost well before November 8.

POLITICO looks at how Obama's "red line" haunts both candidates.

The New York Times, on the latest Wikileaks release: "Stretching over nine years, but drawn mainly from the past two years, the correspondence captures in detail the campaign's extreme caution and difficulty in identifying a core rationale for her candidacy, and the noisy world of advisers, friends and family members trying to exert influence."

"Democrat Hillary Clinton, hoping to win over skeptical and struggling voters, is proposing a new tax cut that would give an additional $1,000 a year or more to millions of parents of young children," writes the Wall Street Journal. "The timing of the proposal appeared to be calculated to deliver maximum political benefit and to appeal to voters who have turned away from her Republican rival, Donald Trump, but haven't embraced Mrs. Clinton."