Former Virginia Gov. Jim Gilmore broke his silence on Monday to say he thinks Florida Sen. Marco Rubio should resign from the U.S. Senate.

Gilmore, a former Republican National Committee chairman turned presidential candidate, has made limited public appearances since the GOP debate on Fox News in August and has failed to qualify for subsequent presidential debates after receiving zero percentage-point support in polls.

The former governor took issue with Rubio's decision to miss votes in Congress, which the senator has attributed to the rigors of the campaign trail.

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"Essentially, Sen. Rubio has abandoned his post and expects the taxpayers of Florida to continue subsidizing his campaign for the White House despite his choice to campaign instead of representing the people who elected him to the Senate," Gilmore said in a statement. "He is being paid by Florida taxpayers to be on the job in the Senate representing their interests. If he is not going to do that, I don't see how in good conscience he can campaign for president without resigning from Senate."

Gilmore, who has consistently ranked last in all of the Washington Examiner's GOP presidential power rankings, has previously targeted Donald Trump and Democratic presidential candidate Hillary Clinton. The governor's campaign has remained in the race long after others, including Wisconsin Gov. Scott Walker and former Texas Gov. Rick Perry, have chosen to exit.

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