Some things about 2013 are easy to predict. We know that taxes are going to rise, and so will the federal debt. We know that there will be more guns in circulation at the end of the year than at the beginning. We know that Donald Trump will get attention for saying something boorish.

It will also be a year of unexpected setbacks for President Barack Obama’s health care law. (Unexpected, that is, except by readers of this column.) Its supporters may believe that with the Supreme Court having mostly upheld the plan, and Democrats having kept control of the White House and Senate, the law is no longer vulnerable to attack. It is still, however, vulnerable to its own flaws.

Predictions: Premiums will go up, especially for young people. The Washington Post’s recent report that “Obamacare exchanges will open for business” on Oct. 1 will be proved false when Health and Human Services Secretary Kathleen Sebelius admits the federal government won’t be ready by then. The Obama administration will propose further delaying the law. Democratic hopes that it will one day prove popular will continue to be frustrated.