Because your analogy is false and misleading, that's why.
DeMint, for instance, endorsed Romney early in 2007, when there were basically no credible Republican candidates in the race - all you had at that point was, well, McCain, who had basically been running for President nonstop since 2000. The same McCain that Palin has chosen to endorse. DeMint's choice was the more conservative of the two. Palin's is most definitely NOT.
DeMint chose the most conservative candidate at the time. Palin has chosen the most leftists, in the context of the Arizona GOP Senate primary. You're comparing apples to oranges.
Brown can support the RINO McCain because Brown isn't conservative.
DeMint can support the RINO Romney because RomneyDeMint is conservative.
Palin can't support the RINO McCain because um, because ah, because what???
Because your analogy is false and misleading, that's why. DeMint, for instance, endorsed Romney early in 2007, when there were basically no credible Republican candidates in the race - all you had at that point was, well, McCain, who had basically been running for President nonstop since 2000.
Wrong.
You ignored what I said. DeMint was a ground floor organizer and fund raiser for Mitt in 2006 while Mitt was still testing the waters and while there was NO announced candidates in the race and several years before the presidential election.
Your potrayal of DeMint's support of Romney is misleading and my above question to you still stands.