Progressive lawmakers are stepping into the political vacuum left by former President Joe Biden as Democrats search for leaders who will challenge Republicans’ newfound control of Washington.

Sen. Bernie Sanders (I-VT), once marginalized by his own party establishment, is now embraced as a conduit for the grassroots anger directed at President Donald Trump. Sanders has brought eye-popping crowds to a string of rallies while raising millions at a time when Democratic coffers are drying up.