“You’re registered as a Canadian citizen, he never knew he was a Canadian,” Trump said while speaking to a crowd packed in a high school in Waterbury, Conn.

Trump said he’s confident Cruz won’t get the Republican presidential nomination, but believes Democrats would sue him if he were to ever become president.

“The first thing the Democrats are going to do is sue him on the basis that he’s not a naturalized citizen, he wasn’t born in the country,” he said.