Chuck Schumer's very happy for his friends Jennifer Lopez and Alex Rodriguez, but when it comes time for their wedding ... he wants nothing to do with leading them through their vows.
The New York Senator was out in D.C. Monday and got asked about J Lo and A-Rod's recent engagement ... he seems to be all about it.
Schumer's not down with officiating their nuptials, though ... but it's nothing personal. Chuck says he has a bad track record so he's sworn it off forever -- basically, he's doing them a favor.