The shop.donaldjtrump.com site is authorized by Trump For President Inc. and the Republican National Committee.
Sales surged on April 18, the day the redacted Mueller report was released, said campaign officials.
“Our Mueller-related merchandise has been doing exceptionally well. Our supporters are even more energized,” said First Daughter-in-law Lara Trump.
Campaign spokeswoman Erin Perrine said, “President Trump is a branding master and all of the best ideas come from his messaging and tweets.”
The store’s best seller, by far, remains the $25 “Make America Great Again” caps, which are closing in on their 1 millionth sale.