How could it not end up being one? You had his mostly Democratic allies up to speak, they're going to say he was a fighter for the people, and they'll say we need to provide services, etc, liberal positions. His friends and family were mostly Democrats. His fans were. So the funeral will certainly have a pro-Wellstone values feel to it.
Akno, were Nancy Pelosi and Tom Daschle booed at Ronald Reagan's funeral. That's right
The situation was COMPLETELY different. It was sad, but not tragic. Wellstone's death was an unimaginable tragedy. He had so much left to accomplish. Reagan had a lifetime of achievement, and his death was expected. Sad, yes, but not as emotional in the sense it was expected and we were prepared for it. A President's funeral is also more dignified, and not held in an arena cramped full of supporters.
No, that doesn't excuse booing a member of the other party who came to honor his colleague. The entire rally was just disgusting and extremely tasteless in every way. The nation, and Minnesota in particular, saw the true face of the Democrats that day. Bitter, angry, and to partisan to even honor a good man without attacking another.