While it's true that JR has called a truce, I believe you mischaracterize his intent and clearly written words by the second half of your comment, which I bolded above. I wouldn't presume to speak for JR about this, but below is his most recent comment regarding Romney. His comment is 100% consistent with everything I've ever seen JR write about Romney, and it would be hard to characterize it as any kind of support, grudging or otherwise.
JimRob's comment yesterday regarding Romney - http://www.freerepublic.com/focus/chat/2880397/posts?page=91#91:
Look, there is no doubt whatsoever about Romney being a liberal progressive. Our pro-life, pro-family, pro-gun, pro-limited government, pro-constitution, pro-liberty principles mean absolutely nothing to him. They’re just talking points that he can give lip service to one way or the other. And he has. He’s been on all sides on all issues and back and forth on most. And he lies. A lot. I’ve posted at least 10,000 times over the last seven or eight years that I would never vote for this progressive bastard so don’t be shocked. Rove screwed the pooch not me.
Yes, JR did not express any support of any kind for Romney.