Story highlights Texas Gov. Greg Abbott will endorse Ted Cruz for president on Wednesday, campaign officials told CNN

The two men will appear together at an event in Houston at 1 p.m. CT, the officials said

(CNN) Texas Gov. Greg Abbott will endorse Wednesday one of his political disciples, Ted Cruz, giving the Lone State senator his highest-ranking political endorsement thus far in the presidential race.

Abbott will formally back Cruz at an event Wednesday at 1 p.m. in Houston, campaign officials said, just six days before what is expected to be a competitive race with Donald Trump in Texas. Although not unexpected, the nod from Abbott is the clearest sign yet that the Texas Republican establishment is backing their freshman senator in his presidential ambitions.

"After 8 years of relentless attacks on our values from this White House, it's our duty as Texas conservatives to support a leader we can trust to restore our values and move this country forward," Abbott said in a video message out Wednesday. "That's why I'm supporting Ted Cruz for president."

Abbott will also quickly become the most senior political leader to back Cruz's bid. No other governor has endorsed him, nor has any senator -- including the state's senior senator, John Cornyn.

A year ago, who Abbott would endorse in the Republican race -- if he would at all -- was one of the hottest questions in Texas politics. But as the field winnowed and the other candidates with ties to Texas -- former Gov. Rick Perry, former Florida Gov. Jeb Bush, Kentucky Sen. Rand Paul and ex-Hewlett-Packard CEO Carly Fiorina -- dropped out, it became increasingly clear that Abbott would choose Cruz, the state's rising political star.

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