President Donald Trump has rejected a Washington Post report that he has refused to share details of his conversations with Russian President Vladimir Putin with top US government officials.
Ukrainian President Petro Poroshenko warned of the threat of "full-scale war" and said Russia had sharply increased its military presence on their shared border as tensions escalate between the ex-Soviet neighbours.
President Donald Trump has rejected a Washington Post report that he has refused to share details of his conversations with Russian President Vladimir Putin with top US government officials.
Ukrainian President Petro Poroshenko warned of the threat of "full-scale war" and said Russia had sharply increased its military presence on their shared border as tensions escalate between the ex-Soviet neighbours.