"The issue of collusion is still open", the committee's Republican chairman, Richard Burr of North Carolina, told a room full of reporters in the Capitol.
The committee is still investigating whether the Russians had any coordination with members of Trump's campaign, and he suggested that they were still examining just how Russians knew where to target social media spots.
The dossier accuses the Trump campaign of conspiring with Russia, and it asserts that Russian intelligence agencies have information about Trump's participation in sexual escapades in Moscow, something Trump has denied.
"Given that we have interviewed everybody that had a hand in the ICA, I think there is general consensus among members and staff that we trust the conclusions of the ICA", he said.
The investigation has so far featured dozens of interviews and thousands of pages of transcripts, he said.
In the end, Burr said, "The committee can not really decide the credibility of the dossier without understanding things like, who paid for it?"
Dozens of intelligence and political officials have been interviewed since the investigation began in January.
However, the Senate Judiciary Committee - which is also conducting its own Russian Federation probe - was able to interview the man who hired Mr Steele to compile the report, Glenn Simpson, behind closed doors. Former FBI Director Robert Mueller is conducting a separate investigation into Comey's firing and the question of campaign collusion with Russian Federation.
The panel has interviewed everyone that was involved in drafting the campaign platform, he said.
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"We've got to make our facts as it relates to Russia's involvement in our election public prior to the primaries getting started in 2018", he said.
Burr added that investigators have "exhausted" every witness for pertinent information on the so-called "Comey memos", or notes that Federal Bureau of Investigation director James Comey kept to detail his interactions with the president.
"We won't release the documents provided to our committee, period", he said, although he said they were "fine" if Facebook and other platforms did so themselves. Mark Warner, provided an update on a congressional investigation that was launched the same month as President Donald Trump was inaugurated.
"The committee can not really decide the credibility of the dossier without understanding things like who paid for it, who are your sources and sub-sources", Burr said. "Who were your sources and subsources?"
Republican Chairman Richard Burr and Democratic Vice Chairman Mark Warner also warned about the risk to future USA elections posed by Russian Federation, including what is expected to be a closely contested election next month for governor of Warner's home state, Virginia.
The probe also includes investigating Russian active measures.
Warner said that the committee's investigation has revealed "strains and threads that we need to continue to pursue" and added that Russian interference "did not end on election day". "There needs to be a more aggressive whole-of-government approach in terms of protecting our electoral system".
Burr and Warner may divulge more information about social media's role in the election.