Birtherism — the repeatedly debunked conspiracy theory that President Barack Obama is not a legitimate American citizen — has made a comeback in the political discourse, and oddly enough it’s the first couple resurrecting it.

In her acclaimed address before the Democratic National Convention on Monday, first lady Michelle Obama talked about encouraging her daughters Sasha and Malia to “ignore those who question their father’s citizenship or faith.” On Wednesday, the president himself made a quip about his Kansas ancestors’ emigrating without their birth certificates in tow during his DNC speech.

Neither mentioned Donald Trump by name during those moments, but anyone who followed the now-GOP presidential nominee’s relatively recent crusade on behalf of the birther movement would recognize who they were referencing. Although Trump has teased a potential foray into politics for years, his aggressive attacks on the president’s personal history vaulted him into a prominent position in Republican party politics.

As the New York Times reported earlier this month: “The more Mr. Trump questioned the legitimacy of Mr. Obama’s presidency, the better he performed in the early polls of the 2012 Republican field, springing from fifth place to a virtual tie for first.”