TRUMP: “[Biden is] going to use law enforcement to try and win an election that he can't win at the ballot box."

High-level national security source said the Obama intelligence community made the same assessment and Obama was briefed.

Leaked phone conversations between Joe Biden and then-Ukraine President Petro Poroshenko have been made public by a Ukrainian lawmaker.

Edited recordings of the calls were played at a news conference Tuesday in Kiev by Andriy Derkach, who has claimed he…