Sen. Ted CruzRafael (Ted) Edward CruzOvernight Health Care: Trump eases rules on insurance outside ObamaCare | HHS office on religious rights gets 300 complaints in a month | GOP chair eyes opioid bill vote by Memorial Day HHS official put on leave amid probe into social media posts Trump, Pence to address CPAC this week MORE (R-Texas) said Thursday that Senate Majority Leader Harry ReidHarry Mason ReidWATCH: There is no Trump-Russia collusion and the media should stop pushing this The demise of debate in Congress ‘North by Northwest,’ the Carter Page remake MORE’s (D-Nev.) negative depiction of the Koch brothers makes them seem like the “Grinch who stole Christmas.”

Reid has increasingly been critical of billionaires David and Charles Koch in the last two months, saying they’re trying to buy U.S. elections by throwing money at Tea Party candidates while hiding behind their political action groups, such as Americans for Prosperity.

“It’s as if they are the Grinch who stole Christmas in his telling,” Cruz said on the Senate floor Thursday refering to the children's book "How the Grinch Stole Christmas."

Reid’s latest accusation is that the Koch brothers are halting progress on a Senate Ukraine aid package.

Cruz said Reid’s attacks were unfair because the Koch brothers were unable to come to the Senate floor to defend themselves.

“Senate rules allow a member of this body if his or her integrity is impugned to raise object,” Cruz said. “Those two brothers are not members of this body. … They’re denied a personal privilege to defend themselves.”

This is the second time Cruz has referenced a Dr. Seuss book on the Senate floor. Last year, he read “Green Eggs and Ham” to his daughters from the floor while he staged a 21-hour speech.