GOP debate about Trump vs. everyone else

WASHINGTON (AP) — And then there were four.
Ben Carson's departure from the GOP presidential race means the quartet of remaining Republicans on the debate stage Thursday night get more time for attacks as Donald Trump treads a path to the GOP nomination and his three rivals try to trip him up. Cheered on by many Republican leaders, Ted Cruz, Marco Rubio and John Kasich are racing the primary clock to March 15, likely their last chance to stop Trump in a series of winner-take-all contests.