The presidential nominating events will spread to the West and South this weekend.
While Kasich and Bush offered conciliatory rhetoric, Trump doubled down.
Trump lifted a leaf out of Karl Rove's playbook to attack Jeb Bush's perceived national security strength.
The next presidential primary will be held in South Carolina on Saturday.
The appearance of the elder Bush on the trail may help Jeb's chances with Republicans in the state.
Republican candidates called each other liars at a debate that saw little consensus, except on delaying a Supreme Court nomination.
Former Virginia Governor Jim Gilmore is the only GOP candidate who didn't earn a spot onstage.
George W. Bush will appear with his younger brother at a rally in North Charleston, S.C.
The success of the two veteran politicians makes the Republican race even more confusing going into New Hampshire.
Bush's affiliated super PAC, Right to Rise, has raised $118 million, but to little effect
Unlike other debates, ABC News will not hold an undercard for low-polling candidates.
The Washington Post reported that Carson planned to eliminate 50 staff positions, or nearly one-half his staff.
The president will visit the Islamic Society of Baltimore Wednesday to meet with community leaders and give remarks.
The controversial billionaire frontrunner was a no-show, as promised.
Gang of Eight! Poison Pill! Also -- Jeb!
South Florida Mayors ask Marco Rubio for help on climate change
Jeb Bush visited the Council on Foreign Relations—an establishment place where he can feel at home.
Three campaign volunteers were in the van when it flipped.