White House officials said if a bill to fast track the Keystone XL pipeline hits the president's desk, he will not sign it.
And Republicans have vowed to do just that.
Senator John Hoeven, a North Dakota Republican, introduced a bill on Tuesday to green light the TransCanada Corp. project.
"If this bill passes this Congress the president wouldn't sign it," said White House Press Secretary Josh Earnest at a press conference.
Earnest explained that there is already a "well established process in place to consider whether or not infrastructure projects are in the best interests of the country."
White House officials have indicated to reporters that Obama intends to wait for the U.S. state department to conclude its analysis of the project, which would be sometime this year.
In March 2013, the U.S. State Department released a Draft Supplemental Environmental Impact Statement (Draft SEIS) on Keystone XL that stated "there would be no significant impacts to most resources along the proposed Project route."
The Keystone XL Pipeline Project is a crude oil pipeline, beginning in Hardisty, Alta., going through Montana and South Dakota, and terminating in Steele City, Neb, USA.
It has a projected in-service date of about two years after the issuance of a Presidential Permit.
The pipeline would have capacity to transport up to 830,000 barrels of oil per day to Gulf Coast and Midwest refineries. According to Keystone, this would reduce American dependence on oil from Venezuela and the Middle East by up to 40 per cent.