Knoxville News: U.S. Sen. Lamar Alexander will call this week on the federal government to allow construction of 100 nuclear power plants over the next 20 years in what will be a preview of the Republican game plan for developing a national energy policy. Congress has been working for weeks on climate change legislation, but Senate Republicans argue that congressional Democrats and President Barack Obama are putting too much emphasis on renewable energy, such as wind and solar, and giving short …