North Carolina state House Speaker Thom Tillis is set to enter the GOP primary to compete to face Sen. Kay Hagan (D-N.C.) in 2014, making him the first elected Republican to enter the race.
Tillis adviser Paul Shumaker confirmed that Tillis will file paperwork with the Federal Election Commission and launch his campaign shortly thereafter.
"He plans to file FEC papers to formalize the committee, and we will subsequently be doing a rollout," Shumaker said.
Hagan is considered a top GOP target. But the field to face her -- which is expected to be crowded -- has yet to take shape, and doesn't appear likely to feature any well-known Republicans.
Other potential GOP contenders include state Senate President Phil Berger and Rep. Renee Ellmers. State Labor Commissioner Cherie Berry announced this week that she will not run.
Like her would-be opponents, Hagan came to the Senate from the state legislature, serving as a state senator until she defeated Sen. Elizabeth Dole (R-N.C.) in 2008.
Tillis, 52, was first elected to the state House in 2006 and became speaker in 2011. He has also served in senior positions at IBM and PricewaterhouseCoopers.
Updated at 11:08 a.m.