President Donald Trump salutes before boarding Marine One on the South Lawn of the White House in Washington, Thursday, Jan. 26, 2017, for a short trip to Andrews Air Force Base, Md., then onto Philadelphia for the Republican Con… PHILADELPHIA – President Donald Trump is trying to cement support from Republican House and Senate members and line up shared goals as he addresses them during their annual policy retreat. Trump’s midday remarks Thursday in Philadelphia come a day after he began overhauling the nation’s immigration rules and moved to jumpstart construction of his promised U.S.-Mexico border wall.