Donald Trump is declaring war on the Republican Party. The presidential candidate is firing back on Twitter at House Speaker Paul Ryan and other Republicans jumping ship from his campaign. This comes as Hillary Clinton teams up with former Vice President Al Gore to campaign on climate change. Our Grace Rauh has the story.

While Hillary Clinton and former Vice President Al Gore talked about the dangers of climate change, Donald Trump was stirring up a storm of his own on Twitter.

The Republican nominee for president unleashed a torrent of Tweets on Tuesday  targeting the highest-ranking Republican in the country, Paul Ryan. The House Speaker said this week that he would no longer campaign or defend Trump — a stunning move signaling, to some observers, a dramatic breaking up of the Republican party.

Trump's campaign has been in a tailspin since the release of a 2005 video Friday that recorded him talking about grabbing women's genitals.

"When you are a star they let you do it," he is heard saying on the tape.

Trump did not only attack the GOP, he also went after his rival in a dark and ominous ad that portrays Clinton as weak and feeble.

"Hillary Clinton doesn't have the fortitude or strength or stamina to lead in our world," the voiceover says in the ad.

At the debate Sunday night,  Trump said the opposite.

"She is a fighter," he said.

Former Vice President Al Gore campaigned with Clinton in Florida — where he lost the presidential election sixteen years ago.

"Your vote really, really, really counts," said Gore, who lost Florida by less than 600 votes. "You can consider me as an exhibit A of that truth.

They were talking about climate change, Gore's signature issue.

"I'm running against a guy who denies science, denies climate change, says it's a hoax created by the Chinese," Clinton said.

Trump has promised to quote "cancel" the landmark Paris agreement on climate change reached last year if he is elected.