Paxton, a Republican, has been dogged by corruption allegations since first taking office in 2014.
He still faces a state trial on securities fraud and is under investigation by the FBI.
Paxton, an ally of former U.S. President Donald Trump, repeatedly insisted that he was innocent and that the impeachment trial is a political witchhunt.
Paxton was overwhelmingly impeached by the Republican-dominated Texas House in May.
The last impeachment trial of a statewide officeholder in Texas was in 1917.
Persons:
Ken Paxton, Joe Biden's, Elizabeth Frantz, Paxton, Donald Trump, Governor Dan Patrick, Patrick, doesn't, Greg Abbott, Biden, Roland Gutierrez, George P, Bush, Rochelle Garza, Paxton's, Nate Paul, Paul, Tony Buzbee, Angela, Brad Brooks, Donna Bryson, Mark Porter, Diane Craft
Organizations:
U.S, Supreme, Trump, REUTERS, The Texas Senate, firebrand, Republican, FBI, Texas, Texas Republicans, Texas Republican Party, Texas House, Texas Senate, Republicans, Thomson
Locations:
Texas, Mexico, Washington , U.S, Longmont , Colorado