The National Rifle Association acted as a “foreign asset” for Russia in the period leading up to the 2016 election, according to a new investigation unveiled Friday by Sen. Ron Wyden, D-Ore.

Drawing on contemporaneous emails and private interviews, an 18-month probe by the Senate Finance Committee’s Democratic staff found that the NRA underwrote political access for Russian nationals Maria Butina and Alexander Torshin more than previously known — even though the two had declared their ties to the Kremlin.

Then-NRA vice president Pete Brownell, who would later become NRA president, was enticed to visit Russia with the promise of personal business opportunities — and the NRA covered a portion of the trip’s costs.

The conclusions of the Senate investigation could have legal implications for the NRA, Wyden says.

Tax-exempt organizations are barred from using funds for the personal benefit of its officials or for actions significantly outside their stated missions. The revelations in the Senate report raise questions about whether the NRA could face civil penalties or lose its tax-exempt status.

Attorneys general in the state of New York and the District of Columbia are also conducting separate probes into alleged wrongdoing at the gun rights organization. These probes have a broader scope than the Senate report, which focuses on Russia.