Honestly, the FLOTUS (ANY FLOTUS, not just Michelle) does a helluva lot and it's kind of a thankless job, it's one of those things that if she does it right, it slides under the radar but if she's a hot mess everyone notices. But think about it, the First Lady makes appearances where they are judged as representing the US and the President, they organize events both social and diplomatic, etc. ... I think the guy was basically complimenting his wife and making a general observation that a lot of the "women behind the men" don't necessarily get credit for what they do even though without them the man wouldn't necessarily be as successful without them ... and BTW that's how I'd interpret it no matter which POTUS was saying it