PRINCETON, NJ -- President Obama now essentially ties, 43% to 42%, a "generic" Republican candidate when U.S. registered voters are asked whom they are more likely to vote for in the presidential election next year. This marks a change from October and September, when the Republican candidate was ahead, and underscores the potential for a close presidential race in the year ahead. The evenness of independents' preferences marks a significant change from September and October, when independents favored the Republican candidate by a significant margin. The current pattern more closely resembles where independents were earlier this year, when Obama and...