One potential attack noted Trump’s recent remark “to a Christian audience in Iowa that he has ‘never asked God for forgiveness.’” Another depicted Trump as “a New York liberal pretending to have conservative values.”

Two potential attacks targeted the billionaire businessman’s loyalty to the GOP — one noting that he had changed his party ID, the other mentioning his Reform Party candidacy for president in 1999/2000 and his prior financial support for Democrats.

Three other attacks cited Trump’s stances on eminent domain, abortion and single-payer health care, respectively.

The message-testing call comes as the race to win Iowa has apparently narrowed to Cruz and Trump, both of whom lead Marco Rubio, the third-place Republican, by double digits in the RealClearPolitics polling average.