In a recent interview, former President Barack Obama said that he was concerned about the weak level of communication between the White House and Moscow after the invasion of Ukraine.

During the tumultuous Cold War, which lasted from 1947 to the dissolution of the Soviet Union in 1991, Obama said that he tried to forge diplomatic efforts with both Putin and Medvedev.

The lines of communication between the White House and the Kremlin are not as strong as they have been in the past. In some of the lowest points of the Cold War, there was still a sense of being able to pick up a phone and work through diplomatic channels.

He said that he didn't think it was the fault of the administration. I believe that we're now dealing with a Russian regime that is more centralized, more isolated and closed off. I believe that Putin has consolidated decision-making to a degree that we have not seen before.

The United States is trying to reestablish some of the communication channels that have been lost.

President Joe Biden's administration this week set aside additional funding for Ukraine's military efforts against Russia with a $725 million package in security aid.

Russia has become isolated on the international stage since February, when Putin launched the invasion.