President Obama’s critics are right: Obamacare doesn’t guarantee that everyone who likes their health insurance can keep it. In some cases, Obamacare is the reason people will lose health insurance they liked.

What Obamacare comes pretty close to guaranteeing, though, is that everyone who needs health insurance, or who wants health insurance, can get it.

It guarantees that if you lose the plan you liked — perhaps because you were fired from your job, or because you left your job to start a new business, or because your income made you ineligible for Medicaid — you’ll have a choice of new plans you can purchase, you’ll know that no insurer can turn you away, and you’ll be able to get financial help if you need it. In states that accept the Medicaid expansion, it guarantees that anyone who makes less than 133 percent of poverty can get fully subsidized insurance.