From George Conway’s op-ed in the Washington Post:
Before the Senate on Saturday, deputy White House counsel Michael Purpura laid out the elements of that defense. Key among them: “Not a single witness testified that the President himself said there was any connection between any investigations and security assistance, a Presidential meeting, or anything else.”
If Bolton testifies to what’s in his manuscript, these arguments, weak as they are, will collapse. The words will come from Trump’s mouth, because Bolton will have put them there. The direct witness whose absence Trump’s lawyers trumpeted will have appeared.
And that witness would destroy the central defense Trump’s lawyers have raised. Which is that the call with Ukrainian President Volodymyr Zelensky was perfect — factually, legally, and constitutionally.