The merger between US West and Global Crossing announced last week has met with skepticism from investors and questions about whether the deal might even fall through. Shares of both companies have posted significant declines since the largest phone service provider in Minnestota announced its marriage to a high flying telecommunications upstart. Minnesota Public Radio's Bill Catlin reports. The merger combines US West's local telephone business with Global Crossing's under-sea fiber optic cable business. Another piece of the deal involves the national long distance and data transmission operations of Frontier corporation of Rochester New York, which is also merging with Global Crossing. Diane Wells with the Minnesota PUb