Here’s my theory. Hitlary sees 2016 as a lost cause due to The Chosen One’s incompetence and Obamacare blowback. She’ll be awful old by 2020.
RE: Shell be awful old by 2020.
In 2016 She’ll be Reagan’s age when he was first elected. If she runs on 2020, she’ll be Reagan’s age in his second term, and older than McCain when he ran in 2008.