As Maryland, Virginia and the District all vie to be the next home of the FBI, Maryland ’s Congress members are trying to boost their bid by coalescing around one potential site — Prince George’s County.

Maryland Sens. Benjamin Cardin (D) and Barbara Mikulski (D) and all eight of the state’s U.S. House members have signed a letter to the heads of the FBI and the General Services Administration endorsing Prince George’s as the best possible location for the bureau’s next headquarters. The move comes after Montgomery County officials, having considered their own bid for the FBI, decided to back out of the competition.

“We strongly encourage GSA to choose a site in Prince George’s County Maryland,” the delegation wrote. “We understand that competition for this facility will be fierce among the region’s jurisdictions, but we firmly believe that an honest analysis of the cost of operations, security, convenience of location for staff, transportation options, and the promotion of regional equity in federal facility distribution should make Maryland the choice location for the FBI.”

Though no final location in Prince George’s has been selected, top leaders in the county are backing a plan to put the FBI near the Greenbelt Metro Station.

Virginia lawmakers are pushing hard to bring the bureau to their state, but their bid is complicated somewhat by the fact that multiple counties are eager to attract the FBI.

Fairfax County has been especially aggressive, and has suggested the current site of a GSA warehouse near the Franconia-Springfield Metro Station. But some local officials worry that the bid could be complicated by the presence of a secret CIA facility at the site.

The District, meanwhile, has proposed building a new FBI headquarters on a portion of the Poplar Point site in Southeast.