Twelve years ago, during George W. Bush's presidency, Republican scandals turned a bad mid-term election into a terrible one. Unexpectedly, Democrats recaptured House and Senate majorities.
This year, under President Trump, Republicans suffer from more and deeper scandals. Could Democrats exploit them for the same November effect?
This week's arrest of GOP Rep. Chris Collins, charged with conducting insider trading while attending a White House picnic, amplified a question looming over election season. But scandal represents an uncertain tool for political campaigns - which sometimes can even backfire.
In 2006, allegations of financial misbehavior rocked a series of GOP members. House Majority Leader Tom DeLay quit under a cloud; two colleagues, Duke Cunningham and Bob Ney, eventually went to jail.