I hereby resign the United States Senate

[Lunar]

He is allowed to represent Massachussets by abstaining from every vote.  I bet you that his constituency would support him remaining their senator.

[Lunar]

That's not the point he's making, its that Kerry is neglecting his duties as a Senator while he's campaigning.

Kerry has no real "duties" as senator other than to represent the will of the people of Mass.  He has no duties beyond this, only abilities, like the ability to vote on bills and whatnot.  I think that the people in his homestate want him campaigning 24/7 across the country, so he seems to be fulfilling his duties just fine.

If Kerry was in some other position that required constant supervision, such as presidency or governership, then perhaps it would be different.  I would have to consider it in whatever context in that type of situation.

[Lunar]

He is allowed to abstain from every vote though, so long as the people of Massachusetts allow it.  I think his constituents want him campaigning constantly and don't care half as much as you do in New York

[Lunar]

But he is also getting a paycheck .

Yup, because his job doesn't require him showing up for work unless his constituency requires it through their votes.  It's not quite the same thing as a job at a fast food restaraunt where part of your job contract is showing up for work every day.

If his constituency doesn't care or would prefer for him to be out there campaigning, then what Kerry is doing is acceptable.  If his constituency strongly disagrees with what he's doing by not voting on these bills, then Kerry's behavior is not acceptable.