And as you see in NH, there are all sorts of dirty tricks they can try.
(In NH the GOP legislature just introduced a bill that would deny college students the opportunity to vote in their college towns. What makes that noteworthy is that the sponsor of the bill explicitly said that it was because he wanted to stop college students from voting because they vote for liberals.)
http://news.yahoo.com/s/yblog_theticket/20110308/ts_yblog_theticket/ahead-of-the-2012-campaign-states-debate-voting-rightsSo, if they ram through a voter ID, and make sure it's extra hard for someone without appropriate ID to get the appropriate ID, I'm sure they can find other ways to disenfranchise voters too. As yesterday showed, it's impossible to overestimate (underestimate?) how low these folks will sink.
In fact, one more thing to consider when guessing how far these guys will go to drive a political agenda (beyond the union busting bill itself, obviously) is the anti-prank call bill the leg. proposed a day after the Koch call, which they seriously claimed was in no way connected to their pet gov. getting punk'd. The law is nothing more than just a tool to them to beat down their opposition.