This week, House Democrats announced they would open an inquiry to begin impeachment proceedings for President Trump, finally breaking in favor of the position of “the squad” — young, liberal, newly elected congresswomen who had clashed with leadership repeatedly over issues such as impeachment ever since they were sworn in.

But the battle between leadership (average age of 72) and “the squad” (average age of just over 38) has also exposed other fault lines in the Democratic Party over the Green New Deal, healthcare, and more. Nowhere is this showing up more in the Democratic electorate than the primary contest, particularly the gap in support from seniors and young Democrats for both Bernie Sanders and Joe Biden.