Canadian Minister of Natural Resources Joe Oliver will meet in Washington, D.C. Monday with U.S. Energy Secretary Ernest Moniz, a visit that arrives Canadian officials press the Obama administration to approve the Keystone XL pipeline.

Oliver will also give remarks to reporters that highlight the “significance of the Canada-U.S. energy relationship and Canada as the United States’ responsible energy supplier,” Canadian officials said.

The State Department is leading the administration’s Keystone permit review, but Moniz is a key voice in President Obama’s energy and environmental team. The final decision is expected to come from the West Wing.

Oliver is likely to face questions about Canadian Prime Minister Stephen Harper’s reported late August offer to Obama, disclosed Friday, on joint efforts to curb oil-and-gas sector carbon emissions in order to gain U.S. approval of Keystone.