May 2, 2016 3:27 PM EDT

Sen. Ted Cruz tried to sway some supporters of his rival Donald Trump while campaigning in Indiana Monday ahead of the state’s primary, but they shut him down.

“We don’t want you,” a supporter flat-out told Cruz before telling him to “do the math.” The “math” line references the delegate deficit Cruz would have to overcome in order to clinch the nomination. Cruz continued trying to connect with the man for several minutes—even noting that if the tables were turned, Trump wouldn’t converse with a protester—but couldn’t bring the Trump advocate around. The Trump supporter said he particularly liked the billionaire businessman’s plan to build a wall along the southwestern U.S. border and force Mexico to foot the bill (the Mexican government has repeatedly said it would not pay). And then he called the Texas Senator “Lyin’ Ted,” a nickname coined by Trump.

As TIME’s Philip Elliott reported, Ted’s facing an uphill battle in Indiana, a pivotal state in the Republican establishment’s effort to stop Trump:

Watch the full video of the confrontation on CBS News.

Contact us at letters@time.com.

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