Photo, above: Donald Trump (L) patting the back of Texas Sen. Ted Cruz during the Republican Presidential Debate, hosted by CNN, at The Venetian Las Vegas on December 15, 2015 in Las Vegas. AFP PHOTO/ ROBYN BECK

By Caitlin Macneal, Talking Points Memo

Cruz was born in Canada, but his mother was an American citizen, earning Cruz citizenship in the United States at birth. The Texas senator has repeatedly said that he is eligible to run for president.

But as Trump continues to prod Cruz on his eligibility, numerous politicians have noted that the senator’s citizenship is worth looking into.