Sen. Mark BegichMark Peter BegichAlaska political mess has legislators divided over meeting place Former GOP chairman Royce joins lobbying shop Lobbying world MORE (D-Alaska) listed the address of his Washington, D.C., home, rather than his Anchorage home on Federal Election Commission filings — a choice that could muddle attacks Begich has made on whether his opponent has close enough ties to Alaska.

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Begich listed his Capitol Hill address for reimbursements on a number of publicly available FEC forms over the past year. 

This isn't the only time Begich has opted to use his D.C. address over his one in Anchorage — he also lists his D.C. address as the mailing address on Anchorage municipal property records. 

The first-term senator and his allies have repeatedly raised questions about whether his opponent, former Alaska Department of Natural Resources Commissioner Dan Sullivan (R), has deep enough ties to Alaska. Sullivan lived in the Washington, D.C., area while he worked in President George W. Bush's administration, and Begich allies have recently returned to attacks about Sullivan claiming his Maryland home as his primary residence, which Maryland authorities say they will look into. Sullivan's time outside Alaska has been a focal point of the campaign.

Begich's campaign points out that he's owned his Anchorage home for two decades, and Sen. Lisa MurkowskiLisa Ann MurkowskiImpeachment hearings don't move needle with Senate GOP Hillicon Valley: Federal inquiry opened into Google health data deal | Facebook reports millions of post takedowns | Microsoft shakes up privacy debate | Disney plus tops 10M sign-ups in first day Senators press FDA tobacco chief on status of vaping ban MORE (R-Alaska) also uses her D.C. addresses for FEC reimbursements.

"Alaskans in East Anchorage know its not uncommon to run into Mark Begich at Fred Meyer, Home Depot or the Holiday Station because he's firmly rooted in the community he's called home his whole life," said Begich spokesman Max Croes. "Dan Sullivan and outside groups are trotting out the same tired attacks in an attempt to distract from Sullivan's pending Maryland tax investigation and conflicting residency claims."