"Certainly, Hillary Clinton and Trump are today’s frontrunners but you never know what’s going to happen in politics," Kerry told the Rossiya 24 broadcaster.
Asked to offer his opinion on which candidate Russia should support, the US diplomat stressed that he wanted Russia "to root for democracy."
"I want Russia feel that whoever is president, we have certain principles and values in our foreign policy that are consistent with every administration. I am not involved in the politics now. I am out of politics. So, you know, the race will continue for the next few months," Kerry underscored.
The latest nationwide polls, with nearly half the primaries and caucuses behind, indicate that both Clinton and Trump are likely to head into the general elections on November 8.