Thirty-four seats in the U.S. Senate are up for election on Tuesday, putting the balance of power between Democrats and Republicans in question. Nineteen of the seats up for election are held by Democrats,

Texas voters could decide control of the United States Senate this year. Democratic Congressman Colin Allred is challenging incumbent Republican Sen. Ted Cruz for Senate in a race that has attracted national attention.

Incumbent Republican Sen. Ted Cruz and Democratic challenger Colin Allred's Senate race is among the most closely watched this election cycle.