There may be enough new pressure on Senate Republicans to allow witnesses at President Trump's impeachment trial, after the leak from a forthcoming book by former national security adviser John Bolton that contradicts what the White House has been telling the country.
Why it matters: This is a dramatic, 11th-hour inflection point for the trial, with an eyewitness rebuttal to Trump's claim that he never tied the hold-up of Ukrainian aid to investigations into Joe Biden. ...