(NOTE: Check wires for possible movement on Don Beaver, Twins, etc. and updte lead as needed) There's nothing veiled about Carl Pohlad's threat to "export" the Twins to another state. For the past few months, Pohlad has made it very clear that he intends to sell the team to North Carolina-based businessman Don Beaver -- UNLESS state lawmakers come up with the money for a new baseball stadium. But how credible is the North Carolina half of Pohlad's ultimatum? Minnesota Public Radio's Martin Kaste looked into the viability of major league baseabll in North Carolina and prepared this report: BACKANNOUNCE: Tune in Monday for the second part of Martin's report ... on the political fight brewing over pro sports in North Carolina. The issues will sound familiar to Minnesotans... and the Twins may be i