Legal observers estimate the hearing will last three to five days.
The entire hearing had lasted no more than an hour.
Many trials and sentencing hearings last a total of 10 minutes.
The politically charged hearing began on July 26 and lasted for about three weeks.
The public hearing before each vote typically lasted 10 minutes.
Court sources said the hearing that starts on Tuesday will last two or three days.
The hearing lasted three days and it took the jury just 20 minutes to find him guilty.
Senator Biden said the hearings would probably last no longer than three to five days.
Members of both parties were so eager to move forward that the hearing lasted little more than an hour.
A spokesman for the committee said the hearings would last no more than a day or two.
