Current and former officials at the Federal Elections Commission (FEC) say it could take more than a year to determine whether a $130,000 payment made by President Trump Donald John TrumpBubba Wallace to be driver of Michael Jordan, Denny Hamlin NASCAR team Graham: GOP will confirm Trump's Supreme Court nominee before the election Southwest Airlines, unions call for six-month extension of government aid MORE's lawyer to adult film star Stormy Daniels constituted an unreported donation to the Trump campaign.

NBC News reports that the investigation into whether Trump's top lawyer violated campaign finance laws with the payment could last months due to understaffing at America's election watchdog agency.

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“I think it is almost impossible for FEC to finish by the end of year,” former FEC Chairman Trevor Potter told the news outlet.

Former Democratic FEC commissioner Ann Ravel agreed with Potter's assessment, saying the FEC's enforcement division was particularly hard-hit by staffing issues.

“The FEC is understaffed primarily in the enforcement division. So it does have an impact on the ability to aggressively enforce matters and bring them up before the commission in a timely fashion,” she told NBC News.

Another issue that could be facing the agency is partisan gridlock. According to Potter, politicization at the commission has forced commissioners to punt on major issues over the last decade.

“The commission has deadlocked, split between Democrats and Republicans, on almost every issue in the last eight years. I don’t think the FEC will resolve this. There’s a possibility that the [Department of Justice] DOJ could step in if they thought this was worth directly investigating,” Potter said.

Cohen has admitted to making the payment to Daniels, who claims she had an affair with Trump in 2006, shortly after his marriage to first lady Melania Trump Melania TrumpMelania Trump: Ginsburg's 'spirit will live on in all she has inspired' The Hill's 12:30 Report - Presented by Facebook - You might want to download TikTok now Warning label added to Trump tweet over potential mail-in voting disinformation MORE. Cohen has claimed that Trump knew nothing of his payment to Daniels, and the White House has repeatedly denied Daniels's claims.

"The president strongly, clearly and consistently has denied these underlying claims. The only one who has been inconsistent is the one making the claims," White House deputy press secretary Raj Shah said Monday.

"The president doesn't believe that any of the claims Ms. Daniels made in the interview are accurate."