Bolton is the impeachment star of the week, whether he winds up testifying or not, and I can’t shake the feeling that he plotted all of this out: keeping his head down during the hearings in the House; letting it be known only afterward that he’d be willing to testify in the Senate; the revelation this week — simultaneous with assertions by Trump’s defense team that there were no firsthand witnesses to the president’s wrongdoing — that his book indeed addresses Ukraine and fully backs up the charges in the articles of impeachment.