With three weeks remaining until primary day, financier John Delaney is seeking to boost his congressional campaign with a fresh set of ads about a high-profile endorser — Bill Clinton.

John Delaney (Nikki Kahn/THE WASHINGTON POST)

The former president revealed Monday that he was backing Delaney, who is locked in a heated fight for the Democratic nod in the redrawn seat currently held by Rep. Roscoe Bartlett (R). Delaney’s chief primary foe is state Sen. Rob Garagiola, though Air Force doctor Milad Pooran and two other Democrats are also running.

Delaney released his personal financial disclosure forms last week showing that he is worth upwards of $50 million, and he is putting some of that wealth to use on the airwaves, with a television ad and two radio ads highlighting Clinton’s endorsement.

All three ads emphasize the backing from Clinton and seek to tie Delaney to the Obama administration by noting that the Treasury Department gave CapitalSource, the commercial bank founded by Delaney, an “enterprise award” in 2010 for lending money to economically distressed communities (one of more than 70 banks receiving the same honor that year).

The ads also criticize Garagiola for sending negative campaign mail, and one of the spots attacks Garagiola for having failed to disclose outside income from a lobbying job on Maryland Senate disclosure forms.

The spots highlight the lending efforts of CapitalSource just as Garagiola is also seeking to make the bank an issue in the contest. On Thursday, Garagiola’s campaign highlighted the fact that CapitalSource’s own SEC filings reveal that the bank is being audited by the IRS to determine whether it met the requirements to file as a real estate investment trust, a strategy that allowed the bank to pay a lower tax rate.

The Maryland primary is April 3.