Within the first 100 days of Joe Biden's presidency, he's already signed a $1.9 trillion COVID-19 relief package as the vaccine roll-out is accelerating. Meanwhile, the Democrats wrestle with advancing their priorities in the Senate, as Republicans continue to filibuster. There's even talk of eliminating the filibuster, which could obstruct the Biden agenda. Julian Zelizer and Sam Wang unpack it all in this week's episode.