I realize this an unprecedented event in our nation's history. The spouse of a former President is running for President. It's different even from the Father/Son relationship of the Bushes. If Hillary becomes President, the former Mr. President moves into the White House as well. And spouses generally stand by their partner in times like this. All the wives are campaigning hard for the husbands.
In many ways Bill Clinton is in a no-win position. That being said (and yes I'm biased) the tone of his campaigning has been a problem. I like Bill and think that by and large he was a successful President, but he was known then and is known now to get a little out of control. His attacks on Barack Obama have been unseemly and un-Presidential. He may think it worth the price to use up his personal capital to support his wife, but I'm not alone in finding this problematic. According to a Newsweek article, a number of key party leaders, including Ted Kennedy have given him an earful. So far he's not heeding their advice, but I hope someone gets through to him. Not only could he damage his wife's campaign, but the Democrats in November.
I'm trying to be generous here, but he has lost a lot of good will from people such as me.