The rest of the field would jump on him and say, “see he’s already picking his cabinet and the primaries aren’t over yet”.
I do think he could hint at how he would love to see the winner choose her for that job if she wants it. And then go on to name her strong points and why he would like to see that happen.
I still say ABO=Anyone but Obama. I would hold my nose and vote for Romney just as I did for McCain. Palin made that an easier vote for me.
Good luck...there won't be enough of you; just as there weren't enough willing to hold their nose for McCain. Romney = Obama second term. The establishment won't care a whit...