I question any speculation that Clinton had a stroke, which led in turn to fainting, concussion, clot. Her doctors say they found the clot during "a follow-up MRI" after days of recuperation. That suggests they had diagnosed the concussion by means of an initial MRI -- which would surely have detected the stroke if one had occurred.

Her doctors have also said the clot was potentially life-threatening if it had gone undetected, so it's not like they are downplaying its seriousness. On the other hand, millions are on regimens of blood-thinners (I pop 81 mg Aspirins every day) without it impairing their jobs. I don't see this as a disqualifying health issue.

As for Clinton's age per se, there is a full 10-year difference in life expectancy between men in 1980, when Reagan was elected, and women today. If her health were to fail, I would expect her to call it a day after one term. But this single incident sets off no alarm bells for me.

I hated her hawkish posturing during the 2004 primary, but she appears to have gained maturity, vision and stature as secretary of state. I'd vote for her in 2016 if they'd let me.