As Barack Obama and Hillary Clinton race around Ohio and Texas for tomorrow's primaries, they are telling a tale of economic woe. Yet the real story isn't how similar the two states are economically but how different. Texas has been prospering while Ohio lags, and the reasons are instructive about what works and what doesn't in economic policy.

There's no doubt times are tough in Ohio. The state has lost 200,000 manufacturing jobs since 2000, home foreclosures are soaring, and real family income is lower now than in 2000. Meanwhile, the Texas economy has boomed since 2004, with nearly twice the rate of new job creation as the rest of the nation. The nearby table compares the states over a decade or so.

Let's start with the fact that Texas's growth puts the lie to the myth that free trade costs American jobs. Anti-Nafta rhetoric doesn't play well in El Paso, San Antonio and Houston, which have become gateway cities for commerce with Latin America and have flourished since the North American Free Trade Agreement passed Congress in 1993. Mr. Obama's claim of one million lost jobs due to trade deals is laughable in Texas, the state most affected by Nafta. Texas has gained 36,000 manufacturing jobs since 2004 and has ranked as the nation's top exporting state for six years in a row. Its $168 billion of exports in 2007 translate into tens of thousands of jobs.

Ohio, Indiana and Michigan are losing auto jobs, but many of these "runaway plants" are not fleeing to China, Mexico or India. They've moved to more business-friendly U.S. states, including Texas. GM recently announced plans for a new plant to build hybrid cars. Guess where? Near Dallas. In 2006 the Lone Star State exported $5.5 billion of cars and trucks to Mexico and $2.4 billion worth to Canada.

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%). A common joke is that Ohio lays out the red carpet for companies -- when they leave the state. By contrast, Texas has no income tax, a huge competitive advantage.