Oscar winner Jared Leto is among those urging State to reject the pipeline.
Environmental activists will march 1 million comments to State Dept. on Friday.
There has been little recent movement in support or opposition to the pipeline.
Legislation that would deal a significant blow to an Obama administration carbon emissions rule passed the House on Thursday.
The bipartisan legislation helps support communities vulnerable to drought.
The House on Thursday approved the latest Republican plan to jumpstart job creation — a bill that would set hard deadlines on environmental reviews that can delay construction projects for years.
An ad from the oil and gas lobby was shown ahead of a live video stream.
The president's initiative in response to deadly Texas blast has been fraught with delays.
The House voted 229-183 to override the proposed EPA rule.
Members of the House have voted to advance two energy bills, including one that puts timelines on environmental reviews on energy projects.