"He has a lot of experience at being wrong," Rubio said of Biden, who is weighing a bid.
The former House majority leader will co-chair Bush's Virginia campaign.
Clinton's campaign will coordinate fundraising with the national party.
Jordan Fabian 08/27/15 03:24 PM EDT
The resolution to honor the vice president's son comes as Joe Biden weighs a 2016 bid.
Trump said the Univision anchor was "ranting and raving" during a press conference.
O'Malley urged the party not to "circle the wagons" around the front-runner.
Christie said more should be done to enforce gun laws already on the books.
Biden is reportedly sitting down with AFL-CIO President Richard Trumka.
She argues the Republican Party is out of touch with modern-day America.
Paul said "bullying people" won't help the group get its message out.