Rep. David Trone (D-MD) came under fire from fellow Democrats once again, this time for an ad that sparked outrage among black voters.

Trone’s campaign aired an attack ad against his Senate primary rival, Prince George’s County Executive Angela Alsobrooks, last week, during which a black supporter argued that the “U.S. Senate is not a place for training wheels,” taking aim at her record. The remarks were met with outrage from some black women, who claimed it was racist and misogynistic, Axios reported.