Gail Collins: Will impeachment drive Trump batty?

The only problem with impeachment is that it might drive Donald Trump even crazier than usual.Or probably.The scariest thing about the whole process has been the president’s absolute, total inability to handle it like a sane person, let alone a sensible politician. On the day before the impeachment vote, when reporters asked Trump if he accepted any responsibility for what was happening, he did not say, “I just wish I could have been clearer about my total dedication to the country&r