All sides have sent politically potent signals that will be relevant in the months ahead.
At least one senator believes it will be approved in 2015, with or without Obama's help.
A number of senators met with Canadian officials to discuss approving the Keystone XL oil pipeline.
Boehner said he would try to accept the invitation to visit Canada.
A British environmental group says Keystone won't help U.S. meet global emissions goals.