Math is hard:

• Washington Post: Administration 'erroneously' overcounted Obamacare enrollees
• The Atlantic: The Affordable Care Act's Embarrassing Moment of Tooth
• AP: Oops! Administration erred on health law sign-ups
• NPR: White House Acknowledges Over-Counting Obamacare Signups

Budget buster: 

• New York Times: Cost of Coverage Under Affordable Care Act to Increase in 2015
• AP: Health premiums increase 10 to 15 percent in Fla.
• Scranton Times-Tribune: Members in Blue Cross Affordable Care Act plans will see premiums rise
• KSPR: The Obamacare penalty for being uninsured is set for a steep rise
• Washington Times: Obamacare premiums for most popular plans will spike 10 percent: study
• Nebraskan Watchdog: Rural Nebraskans hit with big Obamacare rate hikes

 Measurable troubles: 

• Politico: Gallup: 'New numerical low' for Obamacare
• Wall Street Journal:Op-Ed: ObamaCare Security: Still on Life Support
• The Hill: Washington state health exchange shuts down
• CNN: Obama promised Obamacare wouldn't do exactly what Gruber says it will do
• The Tennessean: Op-Ed: Obamacare has detrimental effect on rural hospitals
• Daily Caller: Years of Obamacare Problems Are Still On The Way
• Wall Street Journal: Op-Ed: Another ObamaCare Deception
• Time: Why Obamacare Is Making Medicare Open Enrollment More Confusing