AUSTIN (AP) - Republican Senator John Cornyn filed his candidacy for Texas' GOP primary on Saturday.
He says the United States needs to fix it's "broken immigration system," and he predicted the war in Iraq will be a dominant issue in next year's election.
Cornyn defended the position he has taken backing President Bush on the war.
Cornyn presented his candidate paperwork for the March 4 primary at the Republican Party of Texas headquarters, alongside Railroad Commission Chairman Michael Williams.
Cornyn once served on the Texas Supreme Court, and was Texas attorney general before he was elected to the U.S. Senate in 2002.
He began his career in elected office as a state district judge in Bexar County.
Consultant Larry Kilgore also is running in the Republican primary against Cornyn.
The winner will face the Democratic nominee.
State Representative Rick Noriega and teacher Ray McMurrey are in that race.