Rubio has telegraphed his interest in going after Cruz’s past work as a lawyer for a Chinese company accused of stealing intellectual property from an American firm. The issue has yet to come up at a debate, but Rubio hammered Cruz for it earlier this week in Des Moines.

“When Ted Cruz had to choose as a lawyer, he was choosing to represent the Chinese,” Rubio told reporters. “You can’t go around saying you’re tough on China but then have a legal record in which you were paid a lot of money to defend the Chinese who had taken a product away from an American — unjustly, unfairly and illegally.”

The attack is a familiar one for Team Cruz. His 2012 Senate race opponent, David Dewhurst, used it aggressively. In a twist, the Dewhurst strategist who crafted those broadsides is now Cruz’s campaign manager, Roe.

There are other echoes of Cruz’s 2012 contest. In that race, Cruz mercilessly mocked Dewhurst for not doing enough debates and events with him, even sending someone in a duck outfit to trail him. Cruz touted the DuckingDewhurst.com domain then; after Trump’s treat, Cruz began promoting DuckingDonald.com.