If Romney doesn't run…
Bush 14%
Christie 11%
Carson 9%
Paul 8%
Huckabee 7%
Ryan 7%
Walker 6%
Cruz 5%
Jindal 3%
Perry 3%
Rubio 3%
Kasich 2%
Santorum 2%
Portman 1%
I mean, that's ridiculous. Carson is only 2 % shy of 2nd place in a national GOP poll. I have an unhealthy obsession with following presidential politics and right after Obama was re-elected, I could not have told you who the hell Ben Carson was. Ridiculous.
Not to mention 1 point out of first place in Iowa:
https://uselectionatlas.org/FORUM/index.php?topic=201668.0