Obama had this to say in his ABCNews interview with Jake Tapper today:
No doubt there are certain burdens for Senator Clinton running as formidable but first time frontrunner as a woman, in the same way I’ve got to deal with some issues as an African-American. Ultimately I think the American people are fair minded and for those who would not vote either myself or Senator Clinton because of gender or race. There are those who are excited about the prospects of the first woman or African-American. There is no doubt there have been occasions where Senator Clinton has had to overcome particular hurdles and that is part of the groundbreaking nature of her campaign.