White House works to contain damage from allegations in forthcoming Bolton book

President Trump and his allies are moving to undermine the credibility of former national security adviser John Bolton, while also preparing to fight his ability to testify during the Senate impeachment trial, according to White House aides and outside advisers familiar with the strategy.

As the president’s lawyers were defending his actions toward Ukraine on the Senate floor on Monday, Trump aides and allies were privately girding for the growing possibility that multiple witnesses will be allowed to appear. They scrambled to determine which testimony they could block and which witnesses they should potentially call, the aides said.