Buttons are set out for attendees at a Need to Impeach teach-in at a public library in Chantilly, Virginia, U.S., June 22, 2019. The dark cloud of impeachment has threatened President Donald Trump for many months, with Democrats in the U.S. House of Representatives, where any such effort to remove Trump from office would begin, divided about whether to proceed. Picture taken June 22, 2019. REUTERS/Jonathan Ernst