Nevada Democrat Jacky Rosen is in a neck-and-neck battle in her bid to return to the U.S. Senate for a second term, while her party lost its slim voting majority in the upper chamber of Congress.

Nevada Democratic U.S. Sen. Jacky Rosen and Republican challenger Sam Brown were literally tied after initial election results were released Tuesday night, and by that time the race in Nevada was already irrelevant to control of the Senate,