Idunno Fran. It seems late now. I pay heed to those who say that anyone jumping in at this moment or at a brokered convention would have a cash and campaign infrastructure deficit so large that overcoming the Obama warchest juggernaut would be nearly impossible.
To have a prayer of success, it would have to be someone who has instant name recognition, political "star" power or charisma to generate it quickly, an already vetted past, acceptable to the Tea Party & establishment base, and some presidential qualification, whether it be tangible or intangible. The long introductory period has come and gone. It would have to be someone who could enter the race and smash down all the barriers to that late entrance being successful. I don't see that person anywhere.
ETA: Thanks for chiming in, BTW. You're welcome any time.