As Congress begins its second week back from August recess, the playing field is virtually level: Americans remain almost deadlocked in their opinion of the Democrats’ health-care initiative, with 46 percent in favor of the proposed changes and 48 percent opposed. There is also a clean split on Obama’s handling of the issue, with 48 percent approving and the same number disapproving. But since mid-August, the percentage “strongly” behind the president on health care has risen to 32 percent, evening out the intensity gap that has plagued him on the subject.

The public also divides about evenly — 51 percent in favor, 47 percent against — on the question of whether people should be required to have health insurance, a central element of the plans under consideration.

But it is the public option that has become the major point of contention, with support for the government creation of an insurance plan that would compete with private insurers stabilizing in the survey after dipping last month. Now, 55 percent say they like the idea, but the notion continues to attract intense objection: If that single provision were removed, opposition to the overall package drops by six percentage points, according to the poll.