President Trump’s legal team resumed its defense Monday in his Senate trial amid growing calls to hear testimony from former national security adviser John Bolton. The calls have been prompted by a report that Bolton’s book manuscript says Trump directly tied the holdup of nearly $400 million in military assistance to Ukraine to investigations of Joe Biden and his son.

The defense team, led by White House Counsel Pat Cipollone and Trump personal attorney Jay Sekulow, offered a preview of its case in an abbreviated session on Saturday in which it argued that Trump had valid reasons for withholding military aid from Ukraine and that House prosecutors overlooked facts more favorable to him.

The crux of House Democrats’ case is the allegation that Trump withheld military aid and a White House meeting to pressure Ukraine to investigate Biden and his son Hunter Biden, who served on the board of Burisma, a Ukrainian energy company, while his father was vice president. Trump’s attorneys are expected to argue that the president was justified in seeking the investigation because of a history of corruption involving the company.

●Key GOP senators say reports on Bolton book bolster case for witnesses in impeachment trial.

●Trump denies telling Bolton that Ukraine aid was tied to investigations as explosive book that claims otherwise leaks.

●Trump says he was concerned about corruption in Ukraine. The evidence indicates he was focused on Biden.