The Maryland Democratic Party purged a congressional candidate this week, claiming she committed voter fraud in 2006 and 2008 and calling for an investigation.

Wendy Rosen, a Democrat who was until Monday set to challenge Rep. Andy Harris (R-MD), quit the campaign on Monday after being confronted with the allegations. The Maryland Democratic Party explained that records indicate she voted in both Maryland and Florida in 2006 and 2008 -- alleging, in effect, that she's committed voter fraud.

Rosen apologized to friends and supporters in a Monday note published to her Facebook page that was cross-posted to Twitter, but that note appeared to have been deleted by Tuesday afternoon. Her name will still appear on the ballot, but Democrats said they would select a write-in candidate to challenge her and Harris, even though Harris is favored to win.

"Any effort to corrupt or misuse the electoral process is reprehensible, wrong and must not be tolerated," the state party's chair explained in prepared text.

The purge couldn't come at a worse time for Democrats, who are fighting voter identification laws in states like Pennsylvania, Florida and Wisconsin, where crucial contests may come down to a razor thin margin of victory. Republicans say that voter ID laws, the likes of which 14 states have adopted, will help prevent voter fraud, although voter fraud is incredibly rare.