The Latest: Jeb Bush radio ad features brother George

Bush has been enlisted to campaign for his brother in South Carolina, where Jeb Bush is making eight campaign stops in the state over the next three days following a fourth-place finish in New Hampshire.

Florida Sen. Marco Rubio says his underwhelming debate performance and low finish in the New Hampshire primary won't stop him from winning the Republican presidential nomination.

Donald Trump says he will release his tax returns "over the next few months," attributing the delay to the size and complex nature of his taxes.

Trump says he is hoping to become more of a statesman, but notes that he sees nothing wrong with using foul language at his campaign rallies.

Ohio Gov. John Kasich says he will not sit back and "be a marshmallow" and allow his Republican presidential rivals to attack him.

[...] speaking to NBC's "Today" Wednesday, Kasich said he will not allow the negative nature of the campaign to overshadow his positive message.

Donald Trump says he talked with Chris Christie a "little bit" about the New Jersey governor dropping out of the race for the GOP presidential nomination.

Brielle Applebaum of the Conservative Leadership Project says a Wednesday forum on legal and constitutional issues set for Charleston has been cancelled.