The Federal Election Commission (FEC) has reportedly opened a preliminary probe into whether the National Rifle Association (NRA) took illegal contributions from Russian entities aimed at benefiting President Trump Donald John TrumpBiden leads Trump by 36 points nationally among Latinos: poll Trump dismisses climate change role in fires, says Newsom needs to manage forest better Jimmy Kimmel hits Trump for rallies while hosting Emmy Awards MORE's 2016 campaign.

The review was triggered in part after the American Democracy Legal Fund (ADLF), a liberal advocacy group, filed an FEC complaint urging the commission to probe whether money from foreign nationals was aimed at helping the Trump campaign, Politico reports.

The NRA and its lobbying arm spent $30 million in the 2016 election to support Trump. A spokesman for the gun rights group declined to comment to Politico about the FEC probe.

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The ADLF's complaint cites reports that a Russian banker linked to Russian President Vladimir Putin may have tried to influence the election through donations to the gun lobby.

While the FEC declined to confirm to Politico that it had opened a preliminary probe, it reportedly sent confirmation to ADLF treasurer Brad Woodhouse.

In its current stage, the investigation will likely require the NRA to provide the FEC with its campaign finance records from 2016 onwards.

Sources familiar with the probe told Politico that officials could launch a full-blown investigation, move to impose fines or potentially make criminal referrals depending on what FEC lawyers and investigators find.

The probe follows a request from Sen. Ron Wyden Ronald (Ron) Lee WydenGOP set to release controversial Biden report Democrats fear Russia interference could spoil bid to retake Senate GOP senator blocks Schumer resolution aimed at Biden probe as tensions run high MORE (Ore.), the top Democrat on the Senate Finance Committee, for the NRA to provide campaign finance documents following reports of an FBI probe into the Russian banker's activity.

Wyden asked the NRA to provide any donations or contributions accepted from any Russian official or operative.

Special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE is currently leading an investigation into whether Trump campaign associates colluded with Russia to influence the election, as well as probing Russia's broader state-backed efforts to interfere in the election.