Ted Cruz, a GOP Senate hopeful, talks with his father, Rafael Cruz, as he works at the campaign's phone bank in Houston on Tuesday. Mr. Cruz, a former Texas solicitor general and the son of a Cuban-American immigrant, is banking on getting into a one-on-one runoff with the longtime lieutenant governor. (Associated Press)

Ted Cruz, a GOP Senate hopeful, talks with his father, Rafael Cruz, as he works at the campaign's phone bank in Houston on Tuesday. Mr. Cruz, a former Texas solicitor general and the son of a Cuban-American immigrant, is banking on getting into a one-on-one runoff with the longtime lieutenant governor. (Associated Press)