It finally happened: on Tuesday, Speaker of the House Nancy Pelosi announced the beginning of a formal impeachment inquiry against President Donald Trump. The final straw was a July phone call in which Trump pushed Ukrainian President Volodymyr Zelensky to investigate his potential 2020 rival, Joe Biden, and appeared to suggest that US aid to Ukraine might be contingent upon his compliance. Nearly all of the 2020 Democratic candidates have come out in support of impeachment proceedings. On this week’s Deconstructed, one of those candidates, former HUD Secretary Julián Castro, joins Mehdi Hasan to discuss the week’s developments. Intercept DC Bureau Chief Ryan Grim stops by to break down the political prospects for impeachment.