When it comes to political families at the national level in the US, they're pretty much all the same regardless of whether they've got a D or R next to their name. They'll do what they can to win and continue their legacy. So, when Mitt Romney bowed out of a third bid to become the next president of the United States, the Republicans should pay attention.
If anything, Romney is a very calculating individual who knows risks and he's very good at it. I'll get more into this later if warranted but despite President Obama and the Democratic Party getting badly bruised in the 2014 midterms, they are poised for a comeback in 2016 with a rejuvenated Hillary Clinton, improving economy, and continued low polling numbers for Congress.
All these factors with carefully tested populist messages the White House used in 2012 and is testing could be issues once again in 2016. Furthermore, the idea of the first female president of the United States coming so quickly on the heel of the first black President of the United States could be enough to galvanized the Obama base and nostalgic notions of the later years of Bill Clinton's presidency.
And if Mitt could not beat a weakened Obama in 2012, he decided he could not beat a stronger Clinton campaign.
It'll take another political dynasty to challenge Clinton. The question should move into whether Jeb Bush has what it takes to give the Bush dynasty a third president or not.