Besides Texas he won the Iowa caucus, Oklahoma, which was a closed primary, and the Alaska caucus
Cruz won IA and AK by a whisker. He won TX with less than a majority, historically low for a native son. These are not signs of a nationwide winner, however much his followers might want to believe he can get elected in November.
Cruz’s showing relative to all the pre-primary/caucus season hype has been poor. He was supposed to win the south, and didn’t. He has a limited, hard-core following, but can’t get beyond that. He just can’t.