2/ More from the article:

"The decision [not to run] was part political, part actuarial. The men in his family had history of sudden heart failure & none had lived longer than his father who died at 88. “Do I want to spend 8 of 12 years I have left sitting here & not getting anything done?”...But there was something else. His time in the Senate had left Romney worried—not just about the decomposition of his own political party, but about the fate of the American project itself"