President Donald Trump’s fiercest Democratic critic has launched a new attack on the president, this time telling him to just resign so that she no longer has to fight for his impeachment. Representative Maxine Waters, of California, has repeatedly called on Trump to be impeached, citing a variety of reasons, from his conduct in office to what she has alleged was his campaign’s collusion with Russia, even before Special Counsel Robert Mueller has concluded his investigation into Russian interference. Asked if she had any advice for Trump during a gala for the Time 100 in New York on Tuesday, Waters...