WASHINGTON _ Bernie Sanders' boundary-pushing policy agenda defined the septuagenarian senator as a fresh, revolutionary candidate to legions of young and progressive supporters, helping carry him to unexpected success in his first try for the presidency.
He won't have it as easy the second time around.
As Sanders begins a new presidential campaign, he faces the possibility of falling victim to his own success. The policies that once made him a fringe figure in Democratic politics have _ in part because of his own popularity _ been widely adopted inside the party, including by many of his 2020 rivals.
