Iowa Gov. Terry Branstad has made it clear that he won't back Ted Cruz or Donald Trump. | AP Photo Iowa Gov. Branstad: Questions about Cruz's eligibility are 'fair game'

Iowa Gov. Terry Branstad believes the question of Texas Sen. Ted Cruz's eligibility in the presidential race is "fair game."

"When you run for president of the United States, any question is fair game. So let the people decide," Branstad told reporters on Monday during a weekly press briefing, according to The Des Moines Register.


Canada-born Cruz has said that the legal case for his eligibility is clear based on his mother's U.S. birth, and he released his mother's birth certificate on Friday.

Branstad has vowed to stay neutral in the Feb. 1 caucuses. But those close to him say he's being encouraged to at least consider picking a candidate before then, and has made it clear that he would not back either Cruz or Donald Trump. Chris Christie, meanwhile, has been particularly active in wooing the Iowa governor.

