Here's what the original graphic looked like, as captured by Media Matters:
And here's the correctly proportioned graphic Fox News aired Tuesday:
"Yesterday about this time you might have seen a graphic on the Obamacare sign-up numbers. Here is what it should have looked like," host Bill Hemmer said. "On the left it shows the 6 million sign-ups reported from the administration as of March 27 compared to the target number of 7 million plus. That was our mistake, correction noted."
But Hemmer still failed to mention that CBO had revised its enrollment projection down from 7 million to 6 million after HealthCare.gov's glitchy rollout. In any case, Obamacare sign-ups were on track to hit that 7 million mark as the clock wound down on the open enrollment period Monday night.