I'm skeptical if their clout can match the mid-West agriculture lobby, but it's nice to see people trying:

"The recent informal survey sent to members of BoatUS reveal recreational boaters’ frustrations with using E10 fuel. 91% said they want ethanol-free gas for their boat and more than half of the respondents have had to replace or repair their boat engine or fuel system parts due to suspected ethanol damage. The average price tag for those experiencing damage: $1,000."

http://www.coastalboating.net/News/2015/09-2015/01-09-BoatUS/index.html