Mark and Patricia McCloskey, who have been charged with felony unlawful use of a firearm, say the photographer trespassed.
The poll worker had been instructed to quarantine, but worked on Election Day in a St. Louis suburb.
"This is our moment," the representative-elect said in her victory speech.
A grand jury indicted the St. Louis couple who aimed guns at anti-racism demonstrators in their neighborhood back in June.
Mark McCloskey and his wife, Patricia McCloskey, were charged with felony unlawful use of a weapon.
Daughters of David Dorn, shot when anti-racism protests turned violent in St. Louis, had urged his wife, Ann Dorn, to “not politicize our father’s death."
Lawyers Mark and Patricia McCloskey, who face felony gun charges, will reportedly endorse Donald Trump in their convention address.
The activist's primary win against Rep. William Lacy Clay in Missouri's 1st Congressional District is a milestone for the movement born in Ferguson.
In St. Louis, Kim Gardner survived a Democratic primary amid racist and sexist attacks from the president over a gun case against two Trump supporters.
At least 18 Miami Marlins players have been infected along with three St. Louis Cardinals. More than a dozen games have been postponed.