The Supreme Court won't hear an appeal from a pastor who challenged a state law's noise limit that was used to restrict his anti-abortion protest outside a Planned Parenthood clinic in Portland, Maine.

The justices offered no comment Monday in rejecting the appeal from the Rev. Andrew March. He sued after he said Portland police officers repeatedly told him to lower his voice while he was protesting outside the clinic. March says police invoked a part of the Maine Civil Rights Act that applies to noise outside health facilities.

March says the law "targets pro-life advocates" in violation of the Constitution. A district judge temporarily blocked its enforcement, but the federal appeals court in Boston reversed that ruling.

Clicking 'checkout' could cost more after Supreme Court case

The Supreme Court is hearing a case this week that could affect how much customers pay for online purchases.

At issue is a rule saying that businesses don't have to collect state sales taxes when those businesses ship to a state where they don't have an office, warehouse or other physical presence.

Large retailers with brick-and-mortar stores have to collect sales taxes nationwide, but smaller online sellers can often avoid doing so.

Large retailers say the rule puts them at a competitive disadvantage. States say they're losing out in billions of dollars in tax revenue.

But small businesses that sell online say the complexity and expense of collecting taxes nationwide could drive them out of business.