Religious beliefs, gay rights clash in court case over cake.

A suburban Denver baker who refused to make a wedding cake for a gay couple will argue in court Tuesday that his religious beliefs should protect him from sanctions against his business.

The case underscores how the already simmering tension between religious-freedom advocates and gay-rights supporters is likely to become more heated in the aftermath of the U.S. Supreme Court's landmark ruling last month legalizing same-sex marriage nationwide.

"What the relationship is between that reality and sort of what that will mean for things like service provisions is where I think the battles will really be fought now," said Melissa Hart, a law professor at the University of Colorado.

Canes and Sell were quoted as saying, "We've come up against harder things than this!"