Kamala Harris’ newest campaign adviser David Plouffe wasted no time attacking Donald Trump after the former president pulled out of a planned Sept. 10 debate against Harris that was to be televised on ABC.

In a tweet on Saturday, Plouffe, a former Obama campaign manager, called Trump “cowardly” for wanting to change the date of the debate to Sept. 4 on FOX News.

According to Plouffe, the move illustrates Trump’s habit of only wanting to stay in his “cocoon” surrounded by his MAGA supporters.

Read more at The Daily Beast.