Texas Republican Gov. Greg Abbott ordered the Texas National Guard to monitor a joint U.S. Special Forces training taking place in Texas, prompting outrage from some in his own party.
It's been 35 years since Ronald Reagan announced his run for president. He did so just two months before the Iowa caucuses, unlike the protracted campaigning that takes place today.
A protester in front of Sen. Marco Rubio's Doral, Fla., office in 2013 urges Rubio to stop opposing the inclusion of lesbian, gay, bisexual and transgender families in the Senate's immigration bill.
Joe Raedle/Getty Images
Marco Rubio celebrates onstage with his family in 2010 after winning his U.S. Senate seat in Florida when he was just 39 years old. Now, he's expected to embark on a run for president.
Canadian athletes hold up the national flag during the 2014 Winter Olympics in Sochi, Russia. Sen. Ted Cruz was born in Calgary, and some question his eligibility to run for president in the U.S.