The founder of a real estate investment firm, Bullock announced his congressional bid last year with the hope that his military and business background will elevate him above other rivals in the GOP primary. But he struggled to gain traction against better-known contenders with deeper pockets.

Financial records show he’s raised roughly $250,000 through September, though he’s yet to disclose his latest fundraising haul.

His decision leaves the GOP race to several other Republican rivals including state Sen. Renee Unterman, former Home Depot executive Lynne Homrich, businessman Mark Gonsalves and emergency room doctor Richard McCormick.

Bullock joins a growing field running to replace Graves, the senior-most Republican in Georgia's House delegation, whose unexpected decision to retire triggered a battle to represent a district he won with roughly three-quarters of the vote in 2018.

Other candidates in the race include John Cowan, a Rome neurosurgeon; Clayton Fuller, a former prosecutor; and Marjorie Taylor Greene, an ex-Sixth District candidate who also switched races once Graves announced his retirement.

At least three other Republicans are also considering a bid: Dallas Mayor Boyd Austin, state Rep. Kevin Cooke of Carrollton and Matt Laughridge, an auto dealer and former state Senate candidate.