Sen. Ted CruzRafael (Ted) Edward CruzDebbie Wasserman Schultz marks 10 years as breast cancer survivor Foreign agent registration is no magical shield against Russian propaganda Let Trump be Trump and he'll sail through 2020 MORE (R-Texas) said Thursday that Senate Majority Leader Harry ReidHarry ReidBill O'Reilly: Politics helped kill Kate Steinle, Zarate just pulled the trigger Tax reform is nightmare Déjà vu for Puerto Rico Ex-Obama and Reid staffers: McConnell would pretend to be busy to avoid meeting with Obama 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.