INDIANAPOLIS (AP) — Indiana Gov. Mike Pence is endorsing Ted Cruz in the state’s critical Republican primary.

Pence announced his support for the Texas senator Friday afternoon on The Garrison Show on WIBC-FM. He said, “I will be voting for Ted Cruz. … Ted Cruz is a principled conservative.”

Cruz is desperately seeking momentum in his fight to block GOP front-runner Donald Trump from claiming the delegate majority before the GOP’s national convention in July. A Trump win in Indiana on Tuesday would all but ensure he becomes the presumptive nominee.

Cruz said earlier Friday he would “enthusiastically welcome” Pence’s support.