WATERVILLE, Maine (AP) — Three Maine residents have begun an effort to oust a Republican mayor criticized for making fun of a Parkland, Florida, high school shooting survivor.

Waterville Mayor Nick Isgro tweeted last week student David Hogg should “Eat it.” The tweet was later deleted.

The Morning Sentinel reports ex-Mayor Karen Heck joined two other residents Monday in taking out paperwork at City Hall to initiate the recall process. They’ll need 857 signatures by May to force a recall vote.

Isgro hasn’t responded to requests for comment. The bank where Isgro worked says he’s no longer employed. The bank’s CEO has apologized for Isgro’s “inappropriate behavior.”

Recently Fox New host Laura Ingraham mocked Hogg because some colleges rejected him and Hogg called for an advertiser boycott of her show. Isgro tweeted in response to Fox News’ support of Ingraham, “Eat it, Hogg.”

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