http://www.slate.com/articles/news_and_politics/politics/2015/09/joe_biden_is_taking_a_long_time_to_decide_about_running_for_president_is.html

Joe Biden is still thinking. The vice president’s self-imposed summer deadline for deciding whether to enter the Democratic primary will lapse this week. In an interview with the Catholic America magazine, Biden described his continued ambivalence: “It’s just not there yet and it may not get there in time to make it feasible to be able to run and succeed, because there are certain windows that will close. But if that’s it, that’s it. It’s not like I can rush it.”