Some of Clinton 's 18 million voters are hesitant to back Obama . Obama 's Web site urges visitors to thank Clinton for supporting his campaign . Certainly with respect to the economy , extending unemployment insurance , building infrastructure , '' she said . Comment: Mixed feelings among Democrats whether a joint ticket is a good idea .
Some of Clinton 's 18 million voters are hesitant to back Obama . Obama 's Web site urges visitors to thank Clinton for supporting his campaign . Comment: Mixed feelings among Democrats whether a joint ticket is a good idea .