By Jeremy Herb - 12/01/11 07:58 PM EST
That amendment would bar military detention for U.S. citizens, which has sparked some of the most heated debate on the Defense bill this week.
The detention provisions have pitted Feinstein against another Democratic committee chairman, Armed Services Chairman Carl Levin (D-Mich.), who has joined with Armed Services Republicans to oppose changing the terror detainee language.
Before Thanksgiving, Feinstein said she was undecided how she would vote on the whole bill because of the detainee provisions. The bill is considered must-pass legislation and has passed consistently for five decades.