By David Shepardson WASHINGTON (Reuters) -Senate Democratic leader Chuck Schumer on Thursday criticized Union Pacific's plan to acquire Norfolk Southern in a $85 billion deal that would create the first U.

The merger would create the United States’ first coast-to-coast rail network, spanning 50,000 miles and 43 states.

When Union Pacific and Norfolk Southern announced their merger deal Tuesday to form “America’s first transcontinental railroad,” it puzzled some who recalled the golden spike driven in 1869 at Utah’s Promontory Summit. That last spike only connected two railroads from Omaha, Neb., to Sacramento, Calif.