“He’s entering very dangerous territory!” the U.S. president warned on social media.

US president says Medvedev entering ‘dangerous territory,’ dismisses Russia-India relations saying: ‘I don’t care what India does with Russia’ - Anadolu Ajansı

The remarks follow former Russian President Dmitry Medvedev's July 28 statement that U.S. President Donald Trump's "ultimatum game" with Moscow amounts to a threat to Russia and pushes the United States itself closer to war.