WASHINGTON — The U.S. Government Accountability Office will investigate a controversial White House commission on voting after U.S. Sen. Michael Bennet of Colorado and two other Senate Democrats called for a review of its finances and operation.

The decision isn’t much of a surprise, as the GAO works for Congress and generally is bound to follow through on these requests.

Still, the forthcoming GAO investigation could provide another flashpoint in the fight over the Presidential Advisory Commission on Election Integrity, which the White House launched after President Donald Trump claimed without evidence that millions of people voted illegally in the 2016 election.

The panel has been criticized for its potential to cause voter suppression rather than root out voter fraud or error — which is rare in Colorado and nationally.

In a letter made public by Bennet, the GAO said it would begin its work in five months. Joining him in the call for an investigation were Democratic U.S. Sens. Cory Booker of New Jersey and Amy Klobuchar of Minnesota.