Texas Monthly's Evan Smith interviewed HRC today and they had an extended exchange about Florida and Michigan.
Smith: "... The talk is that you agreed not to seat the delegation."
HRC: "That’s not the case at all. I signed an agreement not to campaign in Michigan and Florida. Now, the DNC made the determination that they would not seat the delegates, but I was not party to that. I think it’s important for the DNC to ask itself, Is this really in the best interest of our eventual nominee? We do not want to be disenfranchising Michigan and Florida. We have to try to carry both of those states. I’d love to carry Texas, but it’s usually not in the electoral calculation for the Democratic nominee. Florida and Michigan are. Therefore, the people of those two states disregarded adamantly the DNC’s decision that they would not seat the delegates. They came out and voted. If they had been influenced by the DNC, despite the fact that there was very little campaigning, if any, they would have stayed home. But they wanted their voices heard. More than 2 million people came out. I mean, it was record turnout for a primary. Florida, in particular, is sensitive to being disenfranchised because of what happened to them in the last elections. I have said that I would ask my delegates to vote to seat."
Smith: "So your intention is to press this issue?"
HRC: "Yes, it is. Yes, it is. It’s in large measure because both the voters and elected officials in Michigan and Florida feel so strongly about this. Senator Bill Nelson, of Florida, early on in the process actually sued because he thinks it’s absurd on its face that 1.7 million Democrats who eventually voted would basically be disregarded, and I agree with him about that."
Reader J.L points out, though, that the "driver" of the votes that day might have been the state property tax amendment, which drew 500K more votes than the presidential primary combined.