I agree that Trump is an opportunist. However, he’s been talking about a lot more than just the BC issue. Here, take a gander, see if you can find all he’s been talking about vs what the MSM have been harping one:
http://www.google.com/search?q=trump+interview&ie
Oh, he has been talking about other issues - certainly - but the thing is that he’s also talked about the certificate. If he’d just refuse to answer questions about that for a couple of days and talk about other subjects, the media would have to spend attention to those other issues. It’s not rocket science.