House and Senate bills both call for 20%, but Senate version would delay the lower rate until 2019.

Private negotiations will determine the content of the bill.

Private negotiations will determine the content of the bill.

Wisconsin Republican says plan favors corporations over other types of businesses.

Wisconsin Republican says plan favors corporations over other types of businesses.

Senate leaders will have to round up 50 votes quickly to succeed.

Senate leaders will have to round up 50 votes quickly to succeed.

Move chops revenue from the proposed 20% excise tax on certain payments to offshore affiliates.