The USA Today poll also found that 55 percent of those surveyed believed that same-sex marriages should be permitted.

In its second case, the Supreme Court narrowly overturned California's Proposition 8 — which banned gay marriages in the state — on technical grounds. The court did not rule in a way that struck down other states' prohibition on gay marriage, however.

The court's decisions though appear to have done little to shift public opinion: an identical 55 percent said homosexuals should be allowed to marry before the rulings. Almost every demographic group supported same-sex marriage, with the exception of Republicans (68 percent) and those 65 and older (51 percent)

Respondents to the poll were not as supportive of the court's decision earlier last week to strike down a portion of the Voting Rights Act.

A plurality — 49 percent — said that a provision requiring certain jurisdictions to get pre-clearance for changes to their election laws should be allowed to stand, while four in 10 backed the court's demand that the enforcement provision be either updated or removed. Some two-thirds of African American households opposed the decision.

That decision may have contributed to the Supreme Court registering its lowest level of approval in the USA Today poll over the past eight years. According to the survey, the high court's approval rating is slightly underwater, with just 43 percent approving of the job it is doing, and 44 percent disapproving.