How the Fifth Republican Debate Could Reshape the Race
Much has changed since the GOP candidates last took the debate stage.
What to Expect From Tonight's GOP Debate
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The Republican presidential candidates arrive in Las Vegas for a debate Tuesday night in a race in which new feuds are poised to erupt, and the focus of which has shifted dramatically toward national security.
There will be plenty for the candidates to chew on after an eventful month since the top contenders last shared a debate stage, with no issue getting more attention than terrorism and foreign policy after attacks killed or injured about 500 in Paris and another 36 in San Bernardino, California.