President Obama endorsed same-sex marriage Wednesday, just hours after North Carolina adopted a constitutional amendment to ban it -- one of 41 states where same-sex marriage is illegal. President Obama's declaration does not change any law, but it does inject a contentious social issue into the race for the White House. "For me personally it is important for me to affirm that I think same sex couples should be able to get married," Mr. Obama said. CBS News correspondent Norah O'Donnell reports Mr. Obama has often said he was in favor of civil unions for gay and lesbian couples and...