Sen. Mark Kirk (R-IL) is facing a tough re-election battle and has declared he doesn’t support Donald Trump’s presidential bid. Kirk is making his point with a new ad in Spanish, declaring his opposition to the GOP nominee.

“Yo no apoyo a Trump,” Kirk states in the 30-second ad aimed at Hispanics, which translates to “I do not support Trump.”

The full translation reads:

When Donald Trump says bad things about immigrants, I have spoken against him. I do not support Trump. I have worked with Republicans and Democrats to reduce gang violence in Chicago and I support immigration reform to help keep families united. I am Mark Kirk and I approve this message, and I am proud to be your senator.

Kirk stopped backing the Republican nominee after Trump criticized a federal judge, saying his “Mexican heritage” made him incapable of impartially presiding over Trump’s case, according to The Hill. The judge was born in Indiana.