A "right to work" state doesn't mean no unions, it means that en employee cannot be forced to join a union as a condition of employment, nor can they be fired should they ever decide to quit paying union dues. It means they are free to join, or not to join, as they see fit, but they have a right to work even if they don't join a union. It's a provision of the Taft-Hartley Act.
In states that are not "right to work" states, often called "forced union" states, the unions have a lot of control over management, something that new businesses, especially foreign businesses, want nothing to do with. That's why these new businesses will rarely even consider a non-right to work state without some contractual stipulation that the unions cannot force anyone to join.
There was an interesting editorial a couple of months ago in the Wall Street Journal that compared Ohio to Texas.
The Wall Street Journal: Texas v. Ohio - The Buckeye Institute
"Ohio's most crippling handicap may be that its politicians -- and thus its employers -- are still in the grip of such industrial unions as the United Auto Workers. Ohio is a "closed shop" state, which means workers can be forced to join a union whether they wish to or not. Many companies -- especially foreign-owned -- say they will not even consider such locations for new sites. States with "right to work" laws that make union organizing more difficult, had twice the job growth of Ohio and other forced union states from 1995-2005, according to the National Institute for Labor Relations."
"Ohio Governor Ted Strickland, a Democrat who supports Mrs. Clinton, blames his state's problems on President Bush. But Ohio's economy has been struggling for years, and most of its wounds are self-inflicted. Ohio now ranks 47th out of 50 in economic competitiveness, according to the American Legislative Exchange Council. Ohio politicians deplore plant closings even as they impose the third highest corporate income tax in the country (10.5%) and the sixth highest personal income tax (8.87%)."
I love this line:
"Ohio lays out the red carpet for companies -- when they leave the state."
"On the other hand, Texas is a right to work state and has been adding jobs by the tens of thousands. Nearly 1,000 new plants have been built in Texas since 2005, from the likes of Microsoft, Samsung and Fujitsu. Foreign-owned companies supplied the state with 345,000 jobs. No wonder Texans don't fear global competition the way some Presidential candidates do."
Below is a map of where the future lies, much to Tallcal's chagrin. The South will rise again, baby!