A Louisiana Republican challenging Democrat Mary Landrieu for her Senate seat is expanding his efforts to prove the three-term lawmaker doesn’t live in her home state, instead using her parents’ address to qualify for the November ballot.

GOP Senate candidate Rob Maness on Friday submitted a written compliant to district attorneys in four Louisiana parishes calling on them to object to Landrieu’s residency qualifications.

The Tea Party-backed Maness formally began questioning Landrieu’s residency last week when he sent a letter about the issue to the Louisiana secretary of state.

Landrieu and her husband live in $2.5 million home on Capitol Hill, according to a statement of candidacy she filed in January with the Federal Election Commission.

However, Landrieu is registered to vote in the New Orleans home in which her parents have lived for decades, and she listed that home as her residence when registering for the ballot last week in Louisiana, according to a Washington Post review of federal, voting and property tax records filed by Landrieu.

"The Constitution, Louisiana law and common-sense says candidates for Senate have to live here when they qualify,” Maness said Friday. “All of the evidence shows that Mary Landrieu doesn't live here."

Landrieu has refuted the claim, telling Fox News: “I have lived at my home on Prieur Street most of my life and I live there now, when not fulfilling my duties in Washington or serving constituents across the state.”

Whether Maness’ argument will result in any consequences for the 58-year-old Landrieu remains to be seen.

However, his efforts will likely help Republicans trying to portray Landrieu as a creature of Washington and connect her to fellow Democrat President Obama, who now has low approval ratings.

Republicans have since the start of the 2014 election cycle targeted Landrieu in their effort to win a net total of six Senate seats and take control of the upper chamber.

Landrieu has held tough, despite the attacks, well-funded political action committees against her and running for office in a conservative state.

She is tied with her closest Republican challenger, Rep. Bill Cassidy, according to essentially every poll.

However, Maness’ late-coming attacks could impact the outcome of the race considering the November elections in Louisiana are open primaries, which means the winner must get 50 percent of the vote or face a runoff.