I think I would be quite happy with either Rubio or Walker, especially if they can be emboldened by Trump. But let's not be dismissive of the Trump candidacy and what it represents.
Among several things, we should be reminded that government should not be the exclusive domain of professionals. A great deal of our deep national difficulty is because we HAVE been persuaded that government is too big and complex to be handled by anyone BUT professional politicians. That is WRONG THINKING, and shame on us for believing that lie. Today more than ever before, anyone who can withstand the rigors of a national campaign, regardless of whether they have ever held any public office, is worthy of full consideration as a candidate.
Consider what supporting professional politicians has produced: Obama, Biden, Hillary Clinton, John McCain, John Kerry, McConnell, Boehner, Pelosi, Reed. The discouragingly long, long list of deeply incompetent "public servants" elected from the ranks of professional politicians is CONDEMNING EVIDENCE that there is no basis for continuing to support that pathway as the only legitimate way to candidacy for high office.
Listen to what Trump said in his remarks yesterday when he announced his candidacy. How many of you have said the same things or felt the same way? Now ask yourself who among the presidential candidates that are professional politicians intend to CHANGE the way we are governed, as compared to MANAGING the way we are governed. Therein lies the litmus test.