President Obama’s spokesman denied Tuesday that Obamacare has discouraged business owners from hiring new staff. The White House’s account differs from earlier union complaints that the law’s 30-hour full-time worker definition has caused employers to cut back job creation.

“The data reflects that there is not support for the proposition that businesses are not hiring full-time employees because of the Affordable Care Act,” White House Press Secretary Jay Carney told reporters during the press briefing Tuesday.

Obama’s union base disagrees. “Right now, unless you and the Obama Administration enact an equitable fix, the ACA will shatter not only our hard-earned health benefits, but destroy the foundation of the 40 hour work week that is the backbone of the American middle class,” Teamsters President Jimmy Hoffa, United Food and Commercial Worker President Joseph Hansen, and Unite Here President Donald “D” Taylor wrote in a joint letter to Senate Majority Leader Harry Reid, D-Nev., and House Minority Leader Nancy Pelosi, D-Calif., last week.

“[T]he law creates an incentive for employers to keep employees’ work hours below 30 hours a week,” they pointed out. “Numerous employers have begun to cut workers’ hours to avoid this obligation, and many of them are doing so openly. The impact is two-fold: fewer hours means less pay while also losing our current health benefits.”