The United States Congress is set to send a bill approving the privately funded Canadian Keystone XL oil pipeline project to President Barack Obama, who has vowed to veto it. The House is expected to pass the bill easily Wednesday, capping weeks of debate over one of Republicans' top priorities - a bill authorizing the construction of the much-delayed pipeline project of Calgary based TransCanada Corp. However, support in both the Senate and House has not been enough to override a veto, and backers of the bill said they are already strategizing ways to get it approved by other means, such as attaching it to a broader energy or spending bill.