U.S. Ambassador to Russia John Sullivan said relations between Moscow and Washington had reached the lowest point since the end of the cold war.

In an interview with Russian RBK television, Sullivan said his job was to improve relations. Ambassador added that it’s hard to say how long it would take, but they have to start immediately.

Sullivan noted that they cannot wait for the November elections in the United States or other political developments.

He admitted that Russia and the United States have fundamental disagreements, but Donald Trump instructed him to do everything to improve relations between the states.

Jon Sullivan arrived in Moscow in early January to replace John Huntsman who resigned last August.