National Poll Shows Warren and Sanders in Virtual Tie with Biden

A new poll shows Senators Elizabeth Warren and Bernie Sanders close to overtaking Joe Biden nationally as the race for the Democratic presidential nomination heats up.The former vice president has fallen 13 points from last month to 19 percent support among registered Democrats, while Sanders and Warren have risen six and five points respectively to reach 20 percent support, according to the latest Monmouth University poll. While his one-point deficit is well within the poll's margin of err