Vice President Kamala Harris has secured the endorsement of one of the nation’s largest Muslim American voter mobilization groups, marking a significant boost to her campaign since many Muslim and Arab American organizations have opted to support third-party candidates or not endorse.

Emgage Action, the political arm of an 18-year-old Muslim American advocacy group, endorsed Harris’ presidential campaign on Wednesday, saying in a statement provided first to The Associated Press that the group “recognizes the responsibility to defeat” Donald Trump in November.

The group, based in Washington D.C., operates in eight states, with a significant presence in the key battlegrounds of Michigan and Pennsylvania. The organization will now focus its ongoing voter-outreach efforts on supporting Harris, in addition to down-ballot candidates.