Putin "feels absolutely comfortable in all formats that are comfortable for his interlocutors", Peskov said, adding that the Kremlin "doesn't rule out" a private meeting between the two presidents.
The two leaders were scheduled to meet on July 16 for only the third time and in the first official U.S. -Russia summit since President Donald Trump was sworn into office in January of a year ago.
The delegation of U.S. lawmakers came to Russian Federation ahead of the meeting between presidents Putin and Trump, who are to hold their first serious face-to-face in less than two weeks.
A Senate Intelligence Committee report released on Tuesday supported the conclusion of three USA intelligence agencies that Russian Federation tried to help Donald Trump win the 2016 US presidential election.
Yet the coming summit has fueled concerns among Trump critics in Washington, who raise concerns over an ongoing investigation into his campaign's ties to Russian surrogates amid the 2016 presidential election.
"The President hopes that a meeting can help reduce tensions", US Ambassador to Russia Jon Huntsman told reporters on a briefing call set up by the White House. Another summit is due on July 16th in Helsinki still aimed at world peace.
"We are competitors, but we don't necessarily need to be adversaries", said Shelby, a Republican senator from Alabama, in televised comments. "We will have to wait and see".
Texas A&M Bush School senior lecturer and researcher on issues related to Russia Larry Napper says he supports this summit.
It's not particularly unusual for presidents to sit down solo with other leaders before more formal diplomatic talks involving their delegations.
Lavrov and Pompeo also discussed "a number of current issues of the world agenda, including the situation around Syria and on the Korean Peninsula", the ministry said.