Amtrak could soon allow people to bring guns on most of its trains in a move that critics say would weaken security measures rather than strengthen them after last weekend's White House Correspondents' Association dinner shooting. The company has been considering a policy change that would let customers store guns in lockboxes since at least early this year, after being pressured by the Trump administration to ease restrictions on transporting weapons. Two people familiar with the proposed plan told The Associated Press that the railroad hasn’t abandoned the proposal despite Saturday’s arrest of a man who authorities say traveled by Amtrak from California to Washington, D.C., with his firearms intent on killing President Donald Trump and other administration officials. Cole Tomas Allen was arrested after authorities say he tried to race past security barricades near the hotel ballroom that was hosting the dinner, prompting an exchange of gunfire with Secret Service agents.…