text:  And some will also be looking for whether or not these candidates have the mental and cognitive health to serve as president. That's according to a CBS News poll. CNN will be hosting the debate, but you can also watch it on CBS and CBS News 24-7 streaming starting at 9 p.m. Eastern. All clear following a massive train derailment and evacuations today near Chicago. Madison Mayor Sheila Chalmers-Churin.