UPDATE: Embattled MNsure Chief Abruptly Resigns

ST. PAUL (AP) - The chief of Minnesota's health insurance exchange has resigned abruptly after facing criticism over the rollout and a questionably timed vacation.

April Todd-Malmlov submitted her resignation Tuesday evening during a closed session of MNsure's governing board. She had been under increasing pressure over insurance sign-up problems. She also failed to get a vote of confidence from Democratic Gov. Mark Dayton last week.

She was a key figure in Minnesota's adaptation to the federal health overhaul since 2011. But after the Oct. 1 enrollment launch, MNsure's website encountered technical issues. A backup call center didn't fare much better.

Questions over Todd-Malmlov's leadership ramped up after disclosure of an extended trip to Costa Rica in late November, as critical insurance enrollment deadlines neared and issues were unresolved.