Sen. Ted Cruz says simply screaming "liar" does not validate the arguments of his Republican presidential opponents "who want to run away from their record."

"It is a curious thing — two of the candidates in the race: Donald Trump and Marco Rubio, both have the very same pattern. Whenever anyone points out their record, they simply start screaming, 'liar, liar liar,'" Cruz said to reporters in a video released Monday by his campaign.

"Name calling is not a positive thing in politics," Cruz said, adding he has avoided reciprocating such tactics.

During Saturday's debate, Trump called Cruz the "single biggest liar," after the Texas senator brought up the billionaire's past support for partial-birth abortions and taxpayer funding for Planned Parenthood. Trump also chided Cruz for cheating during the Iowa caucuses by taking votes away from Ben Carson.

Also at the debate, Rubio called Cruz a liar after Cruz said the Florida senator went on Univision to say in Spanish he would not rescind President Obama's executive action on immigration during his first day in office if elected president.

In a separate TV ad released Monday, Cruz's campaign says it's Trump who is changing his position. The Cruz ad shows Trump in TV interviews saying he wouldn't ban partial birth abortion, and saying Hillary Clinton "does a good job."

During the campaign, Trump has said Clinton is the worst secretary of state ever.