A federal judge revoked Paul Manafort’s bail and sent him to jail on Friday to await trial, citing new charges that Mr. Manafort had tried to influence the testimony of two of the government’s witnesses after he had been granted bail. Mr. Trump, in a tweet on Friday, defended Mr. Manafort and criticized Judge Jackson’s action against him, though he seemed to misunderstand what the judge had done.

A lawyer for President Trump broached the idea of Mr. Trump pardoning  two of his former top advisers, Michael T. Flynn and Paul Manafort, with their lawyers last year, according to three people with knowledge of the discussions.