Walker’s endorsement of Cruz was widely expected, especially as conservatives in Wisconsin have coalesced behind the first-term U.S. senator.

Former Gov. Tommy Thompson, who has endorsed Ohio Gov. John Kasich, disputed Walker’s contention that Cruz is best-positioned to defeat Clinton in the fall, noting in an interview with the Wisconsin State Journal a slew of national polls showing Kasich leading Clinton in a hypothetical heads-up match and only one poll showing Cruz leading.

When Sykes pressed Walker on whether he was endorsing Cruz or endorsing against Trump, the governor stuck to talking about why he likes Cruz.

“This is not a default,” Walker said. “I’m only going to do this if I feel strongly.”

Walker’s only swipe at Trump came in response to a question about Trump criticizing Walker’s record in Wisconsin during last fall’s presidential debates. Walker called Trump’s comments “the talking points of the left.”

Walker called Cruz’s tax plan “excellent” and linked him to Ronald Reagan, saying he has a strong plan to build the military. He also highlighted his position on immigration, saying Cruz is “someone who sticks to his guns.”