President Donald Trump addressed an enthusiastic crowd Saturday afternoon at the Conservative Political Action Conference in suburban Washington. The US president has spent the opening weeks of his administration arguing that voters in November gave him a mandate to overhaul government while cracking down on the U.S.-Mexico border and to extend tax cuts that were the signature policy of his first administration. Trump clicked easily back into campaign mode during a speech that lasted more than an hour, predicting that the GOP will continue to win and defy history, which has shown that a president's party typically struggles during midterm congressional elections.