In 2010, President Obama signed the health-care bill. (J. Scott Applewhite/Associated Press)

Since that victory for the White House, the administration has tried mightily to sell its benefits to the public.

And on Tuesday, more evidence of that struggle emerged: Senate staffers got an e-mail alerting them that the Office of Personnel Management — essentially the federal government’s very own human resources department — had yet to update its own forms to reflect the reforms contained in the new health-care law.

One might recall that one of President Barack Obama’s biggest selling points for the law was that parents could keep their dependents on their insurance until the “kids” reached 26. That hasn’t shown up yet in the instructions for their health-care coverage, Senate employees learned.

“Instructions for this form contain outdated information regarding dependent children,” the e-mail said.

Senate staffers were a bit peeved. “We know the Administration did a bad job messaging the health care reform bill, but you’d think they would at least tell OPM about it,” one Democratic aide groused.