Republicans have not been shy in using the ethics charges against Berkley, and most polls have shown her lagging behind Heller, though within striking distance.

A spokeswoman for Berkley’s campaign told the Review-Journal they were confident that a thorough review would clear the congresswoman, and accused Republicans of dredging up the latest information shortly before Election Day. 

"It's unfortunate that Senator Heller and his allies are politicizing the committee through well-timed leaks in order to smear Congresswoman Berkley 10 days before an election," Xochitl Hinojosa told the paper in an email. 

The ethics investigation against Berkley started after The New York Times reported that Berkley, over a five-year period, had pushed for numerous bills or regulations that aided Dr. Larry Lehrner, her husband and a well-known kidney specialist.

House Ethics announced in July that it had unanimously agreed to move forward with an inquiry. The panel had waited until after Nevada’s primaries, in which Berkley easily won her party’s nod for the Senate seat, to proceed.

Berkley has long dismissed the charges about her work to help a kidney transplant unit in Nevada, and has said that Republicans, including Heller, also aided in some efforts.

Senate Majority Leader Harry ReidHarry Mason ReidMcConnell not yet ready to change rules for Trump nominees The Hill's Morning Report — Sponsored by CVS Health — Trump’s love-hate relationship with the Senate Trump to press GOP on changing Senate rules MORE (D), Nevada’s other senator, has dismissed the House inquiry, and said he did not think Berkley would face an investigation if elected to the Senate.