Democrats seized on “explosive” details from John Bolton to increase pressure on the GOP-led Senate to call President Trump’s former national security adviser as a witness in the impeachment trial.

House impeachment managers said Bolton has “vital information” for their case, as evidenced by a New York Times report Sunday evening about Bolton’s upcoming book, which undercuts the Trump defense team’s claim that the freeze of security assistance to Ukraine was separate from the president pressing Kyiv to announce investigations into his political rivals, including presidential candidate and former Vice President Joe Biden.