Cleveland nun to close one night of Democratic convention with prayer By Dennis Sadowski Catholic News Service WASHINGTON – St. Joseph Sister Catherine Pinkerton of Cleveland is not usually one to seek the spotlight, but she will take center stage at the Democratic National Convention Aug. 27 when she gives the benediction to close the party’s third day of business. Sister Catherine, 86, a lobbyist for Network, a national Catholic social justice lobby, will close the convention on the night that Sen. Barack Obama is expected to formally become the party’s nominee for president. The invitation to lead the prayer...