Ted Cruz announces run for president

Sen. Ted Cruz announced on Twitter early Monday morning that he is running for president.

 It's official. Senator Ted Cruz is running for president.

Cruz, the first major candidate to confirm his intention to run in the 2016 White House race, made the announcement in a 30-second video posted to Twitter early Monday.

"It's a time to rise to the challenge," Cruz says in the video. "I'm ready to stand with you to lead the fight."

Cruz is expected to formally announce and address his campaign during a speech Monday morning at Liberty University on Lynchburg, Virginia.

The campaign has also launched its official Web Site, tedcruz.org.