A former adviser to Donald Trump says Russia's president will use soviet spy tactics in negotiations with the US President. 

Trump's expected to speak with Vladimir Putin tomorrow - to discuss ending hostilities in Ukraine.  

He's hoping to get agreement on a 30-day ceasefire proposal accepted by Ukraine last week. 

But John Bolton says Putin's dragged out talks to get the upper hand. 

"He's counting on direct negotiations between himself and Trump to use his KGB manipulative skills on Trump to get even more concessions out of him."

LISTEN ABOVE