President Obama threw jabs at Keystone XL oil sands pipeline supporters on Tuesday, ratcheting up the volume in the clash with Republicans over the project.

Obama doubled down on recent comments that the Canada-to-Texas pipeline wouldn’t be the jobs booster that its champions claim.

“Putting all your eggs in the basket of an oil pipeline that may only create about 50 permanent jobs, and wasting the country’s time by taking something like 40 meaningless votes to repeal ObamaCare isn’t a jobs plan,” Obama told attendees at Amazon.com’s Chattanooga, Tenn., distribution facility.