*bump*
The final two debates have been scheduled:
http://www.jsonline.com/blogs/news/331392271.html
Thu, Feb. 11th in Wisconsin, hosted by PBS
Wed, Mar. 9th in Miami, FL, hosted by Univision/The Washington Post
The first debate is thus two days after the presumed date of the NH primary, and nine days before Nevada.
The second debate is a week after Super Tuesday, and six days before the primaries in FL, IL, MO, NC, OH.
I’m still not sure that last debate will actually happen. If Clinton already has an enormous lead in delegates after Super Tuesday, why bother exposing herself to any more risk by doing another debate?
If Clinton sweeps the board on super tuesday, then Sanders will presumably withdraw and the debate will not happen. But if Sanders can win VT, MA, CO, and MN, and give Clinton a closer than expected race in NC and GA, he'll press on, and Clinton will need to debate again (especially if Sanders wins MI and ME, which are held after Super Tuesday but before this debate) in hopes of knocking him out before he can pull off a Missouri or Ohio on the 15th.
Of course, if Biden gets in, scratch all that, and this debate almost certainly happens.