Sean Sullivan, Washington Post

Democratic presidential nominee Joe Biden, who for weeks has avoided saying whether he supports expanding the Supreme Court, said Monday that he is “not a fan” of the idea that has gained steam in his party’s liberal wing.

McSally lost a close race for Arizona’s other Senate seat this year.

Sarah Palin said in a television interview broadcast Sunday that she will support Speaker Paul Ryan's primary challenger, comparing Ryan to former House majority leader Eric Cantor, R-Virginia, who was stunningly defeated in a 2014 primary.

Sen. Ted Cruz of Texas, desperate to alter the course of a presidential primary fight in which Donald Trump is closing in on victory, will announced Wednesday afternoon that Carly Fiorina will be his running mate if he wins the Republican nomination.

None of the three remaining Republican presidential candidates would guarantee Tuesday night that they would support the eventual GOP nominee for president.

Marco Rubio and Donald Trump emerged Friday as the principal antagonists in an all-out brawl for the future of the Republican Party.

Hours after mounting the fiercest assault of his campaign against Donald Trump in Thursday's debate, Marco Rubio established a new line of attack against the Republican front-runner. On social media, Trump launched his own offensive.

A wave of mainstream Republican donors and elected officials are swiftly flocking to Sen. Marco Rubio, R-Fla., amid a growing sense that is he is the last best chance to prevent Donald Trump from running away with the Republican nomination.

With just 60 days until the Iowa caucuses and then the New Hampshire primary, the sparring reflects an urgent push among the second- and third-tier GOP candidates to become the main alternative to resilient front-runner Donald Trump.