One of the biggest sticking points for the bill is a provision that overrides states' privacy laws.
For decades, Congress has tried and failed to pass a comprehensive consumer data privacy law.
This law is seen as one way Congress is attempting torein in the power and influence of these companies.
Republicans also compromised by agreeing to allow individuals to sue companies under certain circumstances for mishandling of private data.
Her office did not immediately respond to a request for comment.
But without her support, the bill has no chance of advancing in the Senate.
