The top Democrat on the Senate Intelligence Committee said Tuesday that emails published by Donald Trump Donald John TrumpUS reimposes UN sanctions on Iran amid increasing tensions Jeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally MORE Jr. about his meeting with a Kremlin-linked lawyer showed "black and white" that the Trump campaign was involved in Russian efforts to influence the presidential election.

In a series of tweets Tuesday afternoon, Sen. Mark Warner Mark Robert WarnerIntelligence chief says Congress will get some in-person election security briefings Overnight Defense: Trump hosts Israel, UAE, Bahrain for historic signing l Air Force reveals it secretly built and flew new fighter jet l Coronavirus creates delay in Pentagon research for alternative to 'forever chemicals' House approves bill to secure internet-connected federal devices against cyber threats MORE (D-Va.) said that Trump officials "welcomed" assistance against Democratic presidential nominee Hillary Clinton Hillary Diane Rodham ClintonJeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Momentum growing among Republicans for Supreme Court vote before Election Day Warning signs flash for Lindsey Graham in South Carolina MORE from Russia during the campaign.

Warner said the emails were proof that Trump campaign officials have been lying about Russia's involvement from the beginning.

This is black and white: Trump officials at the highest levels knew Russia was working to aid Donald Trump & welcomed Russia's interference. — Mark Warner (@MarkWarner) July 11, 2017

We now know the denials of contacts with Russians that we've heard during the campaign, transition & administration are all patently false. — Mark Warner (@MarkWarner) July 11, 2017

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On Tuesday, Trump Jr. posted a stunning chain of emails with an associate who said he could arrange a meeting with a Russian lawyer claiming to have information that “would incriminate Hillary and her dealings with Russia and would be very useful to your father,” according to the emails. According to Warner, this was the "fire" that investigators were looking for.

There are no excuses for what we’ve seen in the last 24 hours. Lying is not a rookie mistake. — Mark Warner (@MarkWarner) July 11, 2017

For all the denials we’ve heard from the administration, for anyone who’s said there’s smoke but no fire, I’m curious what they’ll say now. — Mark Warner (@MarkWarner) July 11, 2017

Warner concluded by vowing that the Senate's bipartisan investigation into possible collusion between Russia and the Trump campaign would continue uninhibited.

This investigation will move forward in a bipartisan way. We need to follow the facts wherever they lead. — Mark Warner (@MarkWarner) July 11, 2017

Trump Jr.’s email dump comes after a report from The New York Times that he was told prior to the meeting that the lawyer promising dirt on Clinton was part of a Russian effort to help his father’s presidential campaign.

The White House has claimed throughout the ongoing investigation that there has been "no collusion" between the Trump campaign and Moscow.