Justice Antonin Scalia said Wednesday he hasn't had a "falling out" with Chief Justice John Roberts over the Supreme Court's landmark 5-4 decision validating much of President Barack Obama's health care overhaul.

In an interview on CNN's "Piers Morgan Tonight," the justice said despite reports that he and Roberts had clashed, there is not a personal feud going on between the court's two leading conservatives.

"There are clashes on legal questions but not personally," Scalia said of the court.

The Supreme Court earlier this month upheld much of Obama's signature health care law, with Roberts siding with the court's liberals to uphold the hotly debated core requirement that nearly every American have health insurance. The decision allowed the law to go forward with its aim of covering more than 30 million uninsured Americans.

Since then, Roberts has been the focus of derision from some of the nation's leading conservatives, and there have been reports of fractures in the relationships on the court's conservative wing, of which Roberts and Scalia are members.