David Leonhardt: To beat Trump, focus on his corruption

President Donald Trump watches a replay of a lightweight mixed martial arts bout between Kevin Lee and Gregor Gillespie at UFC 244, Saturday, Nov. 2, 2019, in New York. Lee stopped Gillespie in the first round. (AP Photo/Frank Franklin II)House Democrats are doing the right thing by pursuing impeachment against President Donald Trump. But it does create a political quandary for their party.

Democrats have been most successful against Trump when they have focused on his unpopular policies, as they did during the 2017 fight over Obamacare and the 2018 midterms. They have been least successful when focusing on his outrageous behavior, as Hillary Clinton did in her 2016 campaign. Trump’s…