AUSTIN, Texas — State Representative Jason Isaac announced Thursday he's running for Congress.

The Republican wants to replace retiring Congressman Lamar Smith.

Isaac has served four terms representing District 45, which includes much of Hays County.

“During my four terms in the Texas Legislature, I’ve had the honor and privilege of participating firsthand in helping make Texas the freest state in the nation — and it’s time to take those values and experience to Washington,” said Rep. Isaac Thursday. “A new administration promises new hope for constraining the growth of the federal government, but it can’t be done without principled conservative leadership in Congress.”

Smith, who served in Congress for more than 30 years announced his retirement just last week.