(CNN)Ted Cruz is first out the gate. The first-term senator from Texas announced early Monday he is running for president. Cruz announced his candidacy for the Republican presidential nomination in a 30-second video message in a tweet shortly after midnight Monday. Later in the day, he will appear at Virginia's Liberty University, the largest Christian university in the world, where he will make his in-person declaration. "I'm running for President and I hope to earn your support!" Cruz said in his tweet.Cruz, 44, will be the first candidate to formally throw his hat in the ring for what's expected...