A Chattanooga television station won’t run an advertisement in support of gay marriage.

The ad features Jesse Ehrenfeld, a Nashville doctor and Navy reservist who recently returned from Afghanistan. In the ad, Ehrenfeld says he risked his life for “the freedoms that we all enjoy,” and yet does not have the freedom to marry his partner.

Tennessee is one of four states whose ban on same-sex marriage is currently before the U.S. Supreme Court.

Marc Solomon is the national campaign director at Freedom to Marry, which produced the 30-second advertisement. He said Tuesday that WRCB-TV declined the ad as too controversial. Solomon said other television stations in Chattanooga, Nashville and Memphis are running it.

WRCB-TV’s president and general manager was not in the office and unavailable to comment.