A top adviser to President-elect Donald Trump says Kansas Secretary of State Kris Kobach is among the sources behind Trump’s unsubstantiated claim that “millions” of people voted illegally.

Kellyanne Conway was Trump’s campaign manager and mentioned Kobach twice as a source during an interview Friday on ABC’s “Good Morning America.”

Trump has claimed without providing evidence that he would have prevailed in the popular vote absent illegal voting for Democrat Hillary Clinton. The Republican president-elect won enough electoral votes thanks to narrow victories in Michigan, Pennsylvania and Wisconsin.

Kobach on Wednesday supported Trump’s claim while providing no evidence of specific cases of fraud this year. He is the architect of tough voter identification laws in Kansas.