Now, the Frontrunner (or people in his camp) believe that Rick deep-sixed the Frontrunner's so-called "win" in Michigan-you know, the primary where Rick got half the delegates-because Democrats crossed over to vote for Rick in significant numbers (Where are the numbers?). In Mittworld, it is okay for slick-haired sons of politicians who claim to be Republican to vote in Democratic primaries, but it is not okay for his political opponents inside the party to ask for Reagan Democrats to be helpful in defeating the Frontrunner. In short, the Frontrunner thinks it is okay for him to pinch-hit for the other team, but he doesn't think you should be able to if you don't vote for him.
Back in the 1990s, he said he voted for Tsongas out of home state pride and because he liked his platform better than Clinton. Either way, Romney is on record saying that it’s fair game for partisans to participate in the primary with their own team’s best interests in mind.
Let me be clear about something: I do not and never have supported crossover voting. I am a Republican, and I vote in Republican primaries only, because I do not believe that it is right for me to tell the other party who they ought to nominate for offices. I have never voted in a Democratic primary of any kind in my life-for that matter, I have never voted for a Democrat in my life. I've met some Democrats and know many who were and are incredibly nice folks and decent human beings, which, considering the current state and wording of the Democratic platform, leaves us to wonder why they would want to be Democrats-but we'll leave that between them and the Lord.
"Crossover voting is bad except when I do it!"
The reality is that in many primary states, open primaries are the reality, crossover voting is something that any candidate running in such a primary has to consider-it can work for them or it can work against them, but it will happen. Until primaries close or are replaced with a caucus/convention system universally, it makes sense for any candidate to make sure that the crossover vote is working in their favor.
The Frontrunner would do it, he has before, most recently in Michigan in 2008. So either what's good for the goose is good for the gander, or the Frontrunner preferred voting in the Democratic Primary!