Marco Rubio, the conservative Republican Senate candidate who is challenging the establishment-backed moderate Gov. Charlie Crist, just announced the endorsement of a member of the Bush family: Jeb Bush, Jr.

Rubio posted this Tweet: "Proud to announce the endorsement of Jeb Bush Jr. He will be a great asset in our efforts to reach the next generation of GOP leadership."

Bear in mind that while the Bush family name is now generally garbage in the rest of the country, the relatively more competent Jeb Bush, Sr., still retains popularity in Florida -- especially among the conservative GOP base. The question is whether the son's support will have enough credibility with those same activists who might hearken back to his father's two terms as governor.