Yeah I looked it up:

Biden’s attempt to appropriate the “MAGA” brand as a political attack was hardly accidental. It arose from a six-month research project to find the best way to target Republicans, helmed by Biden adviser Anita Dunn and by the Center for American Progress Action Fund, a liberal group.

The polling and focus group research by Hart Research and the Global Strategy Group found that “MAGA” was already viewed negatively by voters — more negatively than other phrases like “Trump Republicans.”

ULLLTRAAAA MMMAAAGGGGAAAA