Stewart, a Republican from Farmington who captured the 2nd District seat in 2012, has raised $143,700 since the start of the year and spent about $108,400 of it. He's left with $205,400 in his campaign account.
He defeated former Democratic state Rep. Jay Seegmiller in 2012 by a 2-to-1 margin.
This year, he faces a challenge for the Republican nomination. Zachary Hartman, a managing director of a real-estate company, has loaned his campaign $17,100 and has $7,000 of that remaining. He has not collected any contributions.
Democratic state Sen. Luz Robles, of Salt Lake City, has said she'd raise $1 million for her campaign, arguing that the money would help her compete in the conservative-leaning district that includes Salt Lake City and a big swath of western Utah going down to St. George.
Since Jan. 1, Robles has raised $19,300 and spent $39,800. She has $18,600 in the bank.