George W. Bush is reportedly not a fan of Sen. Ted Cruz (R-Texas).

"I just don't like that guy," the 43rd president said, according to Politico.

The comment was apparently overheard at an event in Denver with Jeb Bush donors.

Bush is said to have expressed dismay at Cruz's strategy of refusing to attack Donald Trump. Many have pointed out that Cruz is hoping to eventually pick up Trump's supporters.

One donor said he was shocked to hear the statement from Bush, pointing out that others in the room were similarly taken aback after generally positive remarks about Jeb's other rivals. 

Cruz reacted in a statement, saying that he has no intention of going after Bush in response. 

“I have great respect for George W Bush, and was proud to work on his 2000 campaign and in his administration," Cruz said. "It's no surprise that President Bush is supporting his brother and attacking the candidates he believes pose a threat to his campaign. I have no intention of reciprocating. I met my wife Heidi working on his campaign, and so I will always be grateful to him."

Cruz served as a domestic policy adviser in Bush's 2000 presidential campaign.

Karl Rove said on "America's Newsroom" today that Bush has expressed some "astonishment" over Cruz's criticism of his appointment of John Roberts to the Supreme Court. 

Rove noted that at the time of the Roberts appointment, Cruz was a personal friend of the now-Chief Justice and wrote a positive piece about Roberts.

He lamented that Cruz has now, for "political purposes" attacked Bush 41 and 43 for appointing justices who have disappointed conservatives.


WATCH: Cruz Gets Boos Then Applause in Gay Marriage Debate with Colbert

WATCH: Bushes Witness the Amazing Moment a Wounded Vet Proposed to His Girlfriend

Wallace Presses Trump: 'Do You Blame George W. Bush for 9/11?'