Ted Cruz is introducing some voters to what he says is a new term in the fight over immigration: "undocumented Democrats." Speaking in Las Vegas on Thursday, the Texas senator and GOP presidential candidate portrayed the idea of a path to citizenship as a ploy to beef up Democratic voter rolls.

"Proponents of the Gang of Eight were being hypocrites. They were not telling the truth," he said. "What they claimed they were interested in was not in fact what they were interested in. What they were interested in, what Chuck Schumer and Barack Obama wanted, was very simple: They wanted millions of new Democratic voters. There's a reason why I think the new, politically correct term is no longer illegal aliens; it's undocumented Democrats."

The Gang of Eight was a bipartisan group of senators who, in 2013, crafted a compromise immigration reform bill. Cruz isn't just criticizing them to look tough on immigration, a hot issue in the GOP primary this year; one of his biggest GOP rivals, Marco Rubio, was a member of the Gang of Eight.

Criticizing Rubio for his role in that gang has become a part of Cruz's strategy. Cruz also took the opportunity in this week's GOP debate to connect Rubio with the Gang of Eight bill, casting the bill's provisions on refugees as too weak.

Cruz himself in 2013 said he wanted immigration reform to pass, but he introduced an amendment that would have changed the bill's path to citizenship to a path to legal status. At the time, Cruz said that his amendment was designed to help the bill pass. However, he has recently cast his amendment as a "poison pill," designed to keep the bill from passing.

Copyright 2016 NPR. To see more, visit http://www.npr.org/.