GOP debate

LAS VEGAS (AP) -- Sens. Ted Cruz and Marco Rubio clashed sharply over national security and immigration in Tuesday's Republican presidential debate, thrusting their evolving feud to the forefront of the GOP race.

SIMI VALLEY, Calif. (AP) -- Along with the back-and-forth bickering over Donald Trump, the Republican primary took a substantive and serious turn in Wednesday's prime-time debate, with candidates wrangling over Russia, Iran, immigration and gay marriage.