In the last primary season, we had a bunch frontrunners for the nomination, from Perry to Cain to Gingrich to Santorum etc. Will this happen again this primary season, and if so, who do you think will be the frontrunners?
I do believe this will happen again with such a large field.
In the end, I expect Scott Walker and Rand Paul, in that order, to do the best against front-runner Jeb Bush.
Governor Walker is a mainstream conservative and therefore has a lot of appeal to those who dislike Bush on the right. Senator Paul is a libertarian and won't have to compete with any other libertarians running.
However, the moderate wing of the party will be strongly in support of Bush, and he will win enough conservatives like Romney did to win the nomination.