The first full-fledged talks between Russian President Vladimir Putin and his USA counterpart Donald Trump took place in Finland's capital of Helsinki on July 16.
There's no deadline for Mueller to wrap up his probe and he's given no signal that he intends to complete it by the end of the year.
Corker's frustrations followed a week of walk-backs, reversals, and clarifications from a Trump administration trying to account for the president's freewheeling comments about Russian Federation and the 2016 election.
The "Crimea Declaration" appeared to try to quell suggestions that Washington could accept Moscow's 2014 occupation of the Ukrainian peninsula following the Trump-Putin meeting and questions about what Mr Trump agreed to in the one-on-one talks.
Pompeo cited ongoing talks between the USA and North Korea when asked for "verifiable evidence" that Pyongyang had begun to take steps to denuclearize.
Russian Federation has defended its 2014 annexation saying it was approved by Crimean voters in a referendum. He noted that the administration had just days ago provided the Ukraine government with an additional $200 million in military equipment and maintained that the administration was serious about combatting Russian interference in the USA and Western democracies.
U.S. Secretary of State Mike Pompeo said here Wednesday that he is committed to working with the Congress on a new Russian Federation sanctions bill, after he issued a "Crimea Declaration" that rejected Russia's control of Crimea.
In his opening remarks, Corker declared that senators have "serious doubts" about how the administration carries out foreign policy and suggested the White House "is making it up as they go".
"I have tremendous faith in you, I think you're a patriot. but it's the President's actions that create tremendous distrust in our nation", the committee's Republican chairman, Mr Bob Corker, told Mr Pompeo.
On Wednesday, Pompeo said critics were unfairly characterizing Trump administration policy toward Russia as soft, and he ticked off a list of aggressive steps taken, including the expulsion of 60 Russian spies and diplomats, the sanctioning of Russian oligarchs, and the provision of lethal weapons to Ukraine.
In a statement released by the state department, the U.S. secretary of state said the USA will hold on to its long-standing principle of refusing to recognise Kremlin claims of sovereignty over territory seized by force, in violation of worldwide law. Senators tried, with limited success, to glean details from Pompeo about that private Trump-Putin conversation.
Democrats like Senator Chris Coons voiced concern about how Mr Trump's courting of Mr Putin unsettled long-standing allies.
Pompeo said he had personally told top Russian officials that there will be "severe consequences" for any interference in USA elections or the American democratic process.
In that clip, Maddow claimed that the White House recording of the Helsinki Press Conference "skillfully cut out that question from that Reuters reporter as if it didn't happen".
"President Putin, he just said it's not Russian Federation".