Republican voters ousted Utah’s most powerful lawmaker, state Senate President J. Stuart Adams, Tuesday after a series of controversies and mounting criticism for his role as one of the key decision-makers advancing a proposal to build a controversial data center in Box Elder County.

Two other key GOP lawmakers — Sen. Daniel McCay and Rep. Trevor Lee — were voted out as well.

Hundreds of thousands of dollars poured into the competition pitting Adams of Layton against Weber State University’s ex-general counsel, Stephanie Hollist, and former Legislature attorney Braden Hess.

Hollist held the lead around 11:30 p.m. with 43% of the vote, according to unofficial returns, followed by Adams, who conceded defeat late Tuesday, at 35% and Hess with 22%.

Lee, another Layton lawmaker who has drawn controversy during his tenure, conceded his contest to Davis County Commissioner Bob Stevenson, who led 66% to 34%.

Lee has become known for his provocative online persona as a conservative culture warrior, and two Utah businessmen accused him of defrauding their companies earlier this year. House Speaker Mike Schultz, R-Hooper, asked the Utah attorney general’s office to investigate the allegations.

In addition, freshman GOP Rep. Doug Fiefia raced to a sizable advantage against Sen. Daniel McCay of Riverton for a seat in the upper chamber, prompting the latter to surrender the race.

Fiefia led 69% to McCay’s 31% in unofficial results.

Nearly two dozen Utah legislative primary races, seats vacated by retirees and congressional hopefuls were also at stake.

Of the 90 state legislative seats up for grabs this year, 21 contests had primary elections — and some drew more attention than others.

Most of the 21 primary battles were Republican, while six were Democratic.

Utah Democrats staged open primary elections, meaning voters did not have to be registered with the party to cast a ballot — but unless they were new voters, Utahns had to register as Republicans months ago to participate in the GOP primary.

All results must be finalized by July 7.

Senate

Senate District 5

“CJ” Christina Hernandez (D) 58.7%

Dakota Wurth (D) 41.3%

Senate District 6

Tami Tran (R) 71%

Robert Wanlass (R) 29%

Senate District 7

Stuart Adams (R) 34.6%

Braden Hess (R) 22.1%

Stephanie Hollist (R) 43.3%

Senate District 13

Silvia Catten (D) 45%

Evan Done (D) 31.9%

Taylor J. Paden (D) 23.1%

Senate District 14

Tayler Khater (D) 22.1%

Stephanie Pitcher (D) 77.9%

Senate District 18

Doug Fiefia (R) 69.1%

Daniel McCay (R) 30.9%

Senate District 21

Brady Brammer (R) 55.7%

Kelly Smith (R) 44.3%

House

House District 14

John Taylor (R) 56.3%

Kara Toone (R) 43.7%

House District 16

Trevor Lee (R) 33.9%

Bob J. Stevenson (R) 66.1%

House District 17

Sam Barlow (R) 29.1%

Lili Bitner (R) 70.9%

House District 21

Stephen Otterstrom (D) 58.5%

Aaron Wiley (D) 41.5%

House District 29

Sheldon Birch (R) 64.9%

Alexis Wheeler (R) 35.1%

House District 34

Julie Jackson (D) 55.1%

Erin Jemison (D) 44.9%

House District 38

Chris McConnehey (R) 62.4%

Gloria Vindas (R) 37.6%

House District 40

Wendy Davis (D) 47.2%

Andrew Stoddard (D) 52.8%

House District 41

Darren Croft (R) 62.6%

Eryn A. Russo (R) 37.4%

House District 44

Jordan Teuscher (R) 53.3%

Scott Stephenson (R) 46.7%

House District 48

Nik Anderson (R) 43.8%

Jake Hunsaker (R) 56.2%

House District 59

Jeffrey Pierce (R) 44.6%

Luke Searle (R) 55.4%

House District 67

JR Bird (R) 67.6%

Yvonne H. Jensen (R) 32.4%

House District 69

Daniel Gardner (R) 38.1%

Logan J. Monson (R) 61.9%