Trump is spending the weekend at his seaside Trump Turnberry golf resort in Scotland.
Aides had said he’d be busy preparing for Monday’s summit in Helsinki, but Trump spent the first part of Saturday tweeting.
Trump blamed former President Barack Obama for failing to stop a dozen Russian military intelligence officers from hacking into emails belonging to the Hillary Clinton campaign and the Democratic Party.
He also continued to criticize CNN. Trump mocked network president Jeff Zucker as “Little Jeff Z” following a spat with a CNN correspondent at a news conference Friday in Britain.