WASHINGTON (AP) - District of Columbia Mayor Vincent Gray says he won't support an expanded presence for Chick-fil-A in the district because the president of the fast-food chain is opposed to gay marriage.

Gray, a Democrat, referred to the company's product as "hate chicken" in a tweet on Friday. His statement referenced his "long-standing strong support for LGBT rights and marriage equality" and followed similar statements by mayors in Boston, Chicago and San Francisco that the company was not welcome.

Chick-fil-A has no immediate plans to expand in the city. Its only physical location is on the campus of The Catholic University. The company also has a food truck in the district.

A Chick-fil-A spokesman says the company has "biblically based principles" but will no longer participate in the debate over same-sex marriage.