By David Weigel and Robert Costa, The Washington Post WASHINGTON – The conservative movement in America now belongs to President Donald Trump. Thousands of activists will arrive in Washington, D.C., this week for an annual gathering that will vividly display how Trump has pushed the Republican Party and the conservative movement toward an “America first” nationalism that has long existed on the fringes. “Every movement that gets dusty or sclerotic relies on an infusion of energy from the bottom up,” said White House counselor Kellyanne Conway.