Sound Familiar?

According to an article in The New York Times, several battleground states are in violation of federal law for dropping tens of thousands of voters from voter registration rolls. It doesn't appear to be linked with either party but does sound a little suspicious. Barack Obama's nomination and heightened efforts to get young people voting has caused an unprecedented increase in democratic voter registration. For every one person that was added to the voter lists in these states (Michigan and Colorado specifically), two were dropped from the lists by mistake. This is starting to feel familiar. I wonder how many other "mistakes" we're going to see in November.