Run by Ann Patchett

From the book jacket: Since their mother’s death, Tip and Teddy Doyle have been raised by their loving, possessive, and ambitious father. As the former mayor of Boston Bernard Doyle wants to see his sons in politics, a dream the boys have never shared. But when an argument in a blinding New England snowstorm inadvertently causes an accident that involves a stranger and her child, all Bernard cares about is his ability to keep his children – all his children – safe.
The title Run comes into play in a few different ways: run from a life, run for life, and even run for political office. The story takes place over a couple of days. Author Ann Patchett stays true to form in her easy, smooth way of supplying detail so realistic that I shivered along with the characters in the snowstorm.

The edition I read included a P.S. section. Patchett explains why she wrote Run.