Nguyen is the first Democrat to announce for secretary of state, but is the fifth House Democrat to launch a bid for statewide office in 2022, with the party's increasing competitiveness in Georgia making higher office an attractive bet.
She's the daughter of Vietnamese refugees, and has had a high profile after the March shootings that killed eight people, including six women of Asian descent, at Atlanta-area massage businesses.
Raffensperger has said he's running for reelection despite being a target of Trump and other Republicans. Trump has endorsed primary challenger U.S. Rep Jody Hice. Also running in the GOP primary are Alpharetta Mayor David Belle Isle and former Treutlen County probate judge T.J. Hudson.