"We will probably have a better answer by tomorrow morning. There are a significant number of votes somewhere in the range of 22,000 plus in Nevada that still need to be counted, and that is a very close race. That may create the 50th Democratic seat for the Democrat incumbent there, and the votes that have not been counted are from the Las Vegas area which is one of the more Democratic areas of the state, " said Stephen Farnsworth, professor of political science at the University of Mary Washington.

Midterm Election Results (CTV News Canada)