Constellation Brands has tapped J.P. Morgan to lead the debt backing its $1.36 billion acquisition of The Robert Mondavi Corp. “We have an existing relationship with them,” a Constellation spokesman said. Constellation was last in market in July to reprice its $345 million “A” loan to LIBOR plus 1 1/4% and $500 million “B” loan to LIBOR plus 1 1/2% (LMW, 8/2).