He spoke against the practice, and used several prominent Democrats' own words on the subject to support his case.
Cruz joined many Republicans in speaking out against the concept of one party exerting power by increasing the size of the Supreme Court so they can confirm judges whose philosophies are in line with their own.
"Packing the court is wrong, it is an abuse of power," Cruz said during Supreme Court nominee Judge Amy Coney Barrett's confirmation hearing.
"I believe, should they win in November, that our Democratic colleagues will pack the court."
Cruz then used a string of quotes from Democrats who spoke out against court packing in the past.
"I will read you some quotes," Cruz said. "Joe Biden in 1983, quote, FDR’s court packing idea was a boneheaded idea, it was a terrible, terrible mistake to make. And it put in question for an entire decade the independence of the most significant body ... in this country.'"
Cruz then used a 2017 quote from a fellow Senate Judiciary Committee member Sen. Patrick Leahy, D-Vt., who said, "‘The Judiciary Committee once stood against a court packing scheme that would have eroded judicial independence. That was a proud moment."
Ted Cruz was trying to show the hypocrisy around the cse and how Democrats change their stance based on circumstance.
The Texas Republican then cited another Democratic committee member.
"Sen. Durbin, in 2018, quote, ‘Seventy-five years ago we went through this and I think the Congress was correct in stopping this popular president named Franklin Roosevelt from that idea,'" Cruz recalled.
Cruz finished by quoting the late Supreme Court Justice Ruth Bader Ginsburg, who spoke out against court packing in 2019.
"If anything would make the court look partisan it would be that," Cruz said, quoting Ginsburg, continuing, "Nine seems to be a good number, it has been that way for a long time. I think it was a bad idea when President Franklin Roosevelt tried to pack the court."
Cruz listed those quotes after he slammed Democrats for claiming that Republicans have been court packing by rapidly confirming judges to fill vacancies during the Trump administration.
"what we’ve seen this past week is, we’ve seen with a messaged discipline that is really quite remarkable, Democratic senators all making a new argument: that what Republicans have done for four years is packing the court. With all due respect, what utter nonsense," Cruz said.
"Filling judicial vacancies is not what that term means and they are endeavoring to redefine the language to set the framework, to set the predicate for a partisan assault on the court."