(WASHINGTON EXAMINER) Donald Trump disseminated a campaign ad via Instagram on Monday that attacks former Florida Gov. Jeb Bush as “confused” on major issues, implying that perhaps he has smoked marijuana more recently than 40 years ago.

The ad features clips of Bush answering questions, including about the Iraq War and immigration, before highlighting his comment during the September GOP presidential debate that, “Forty years ago I smoked marijuana.”

The short ad closes with text asking, “Are we sure it was only forty years ago?” before the Trump campaign slogan appears. Trump, who remains number one in the Washington Examiner’s power rankings, posted the attack ad with the message, “Jeb has been confused for forty years …”

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