WASHINGTON — No one is working harder for the impeachment of Donald Trump than Donald Trump. If we have learned anything about this president, it is that he has a compulsion to be the center of attention. He can't bear being out of the limelight and will say almost anything — no matter how offensive, outrageous or dishonest it strikes millions of Americans — to keep the public fixated on him. The more he does this, the more he risks impeachment.