Recently, just a day before Crimea successfully voted to secede from the Ukraine, Bill Clinton was asked to comment. Interestingly, he said this about Putin:
“The one thing I will say about him is he was always pretty transparent. He never pretended to be what he wasn’t..."Well, one thing I can say about Clinton is that he is a very skilled wordsmith; never wasting words and always making sure that, what he says sends a clear political message. Rarely does he ever gaffe when talking unscripted. Therefore, I think that the quote, above, is something that he has thought about and clearly wanted to say. For this reason, I believe the former President was trying to send a wake-up call to Obama by telling him that he needs to take Putin's words and actions seriously. Otherwise, he would never have wasted a single word in mentioning something that, to too many people, was clearly obvious.
Source: Clinton On Putin: http://www.washingtonpost.com/blogs/post-politics/wp/2014/03/17/bill-clinton-putin-highly-intelligent-but-has-flawed-view-of-greatness/