Sen. Ted Cruz (R-Texas) became the first major Republican candidate to officially announce he will run for president in 2016.

Cruz released a 30-second video this morning on Twitter, saying he'll run on a message of "hope, freedom and faith in God." 

He said it will take a "new generation of courageous conservatives to make America great again" and that he's ready to "lead the fight."

Hear from Sen. Cruz tonight at 10p/1a ET as he talks to Sean Hannity in an exclusive interview on Fox News Channel. 

Plus, watch Cruz's first speech as a candidate at 10a ET as he addresses Liberty University's weekly Convocation.

Donald Trump, who has said he's considering a bid for the GOP nomination, reacted this morning on "Fox and Friends," saying Cruz could win. 

"I can't be too nice to him. I may be running against him. He's a smart guy, a good guy. I know him and certainly he could make it," said Trump, adding that Cruz did a "good thing for himself" by announcing first. 

"Seems like he and Rand Paul have something going. He probably wanted to beat Rand. Looks like Rand is coming out sometime in April. ... [Cruz] is probably going to get a little extra publicity because he's first," said Trump.

Watch the full conversation below.