The Alberta premier and New Jersey's governor say oil prices shouldn't be the deciding factor on whether the Keystone XL pipeline goes ahead.
Jim Prentice says lower oil prices don't change the fundamental importance of the pipeline to the integration of North American energy production.
And Gov. Chris Christie says major policy decisions should never be based on oil prices of the day, because everyone knows those numbers will fluctuate.
The price of a barrel of oil has fallen below US$70 since OPEC decided last week not to cut production.
Christie and Prentice met ahead of the governor's speech to the Calgary Chamber of Commerce.
Christie is considered one of the Republican party's top prospects to make a run for the White House in 2016 and is a strong backer of the Keystone project.