Smirnoff Vodka is mocking President Trump's alleged ties to Russia in a new ad campaign.

In a billboard spotted in the U.S., the vodka company touts that it's "made in America."

"But we'd be happy to talk about our ties to Russia under oath," the ad quips, referencing Trump, who said Friday that he would "100 percent" be willing to testify under oath about the Russia investigation.

Trump insists that he never asked former FBI Director James Comey for loyalty, and did not ask Comey to drop the investigation into his former national security adviser Mike Flynn.

Senate Minority Leader Chuck Schumer told CBS on Sunday that he is inviting the president to testify before the Senate.