A Republican Congressman told Fox News yesterday that Edward Snowden is a whistleblower, and not a traitor—another clear example of the shifting conversation on civil liberties on the Right.

Fox host Chris Wallace, clearly skeptical, asked Justin Amash of Michigan directly: “You still consider him a whistleblower?”

“Yes,” replied Amash.

Amash stressed that Congress could not provide effective oversight without Snowden’s revelations: “Members of Congress were not really aware … about what these programs were being used for, the extent to which they were being used.”

Late last month, Amash proposed an amendment to strip funding for an NSA program that collects the telephone records of people in the United States. While the amendment failed–narrowly–the vigorous debate it prompted exposed deep divisions in both parties in the NSA debate: it’s not Republican versus Democrat but civil-libertarians versus security hawks. As Jim Antle explained in TAC,

While the Tea Party was split down the middle, with many conservatives bucking the party leadership, civil libertarians on the left also revolted…Republican leaders can’t control the libertarians in their midst and are starting to conclude it’s better not to try. Civil libertarians in the Democratic Party are no longer allowing Barack Obama’s presence in the White House to keep them silent.

According to a Quinnipiac poll released last Thursday, a majority of U.S. voters agree with Amash’s recent comments: 55% percent of respondents say Snowden is “more a whistleblower” than traitor, 34% “more a traitor.”

Particularly interesting is the shift in Amash’s own party that these polls have highlighted. As the Wall Street Journal noted, the Republican demographic has been one of the most drastically changing in recent years. In 2010, 72% of Republicans said counterterrorism did not go far enough, which had fallen to 46% by this summer. And according to last week’s poll, Republicans almost mirror national sentiment: 51% of Republicans label Snowden a whistleblower.

Crucially, the poll was conducted before Snowden accepted asylum in Russia. Whether that will change the public’s mood remains to be seen, but Amash remained circumspect on that question: “He may be doing things overseas that we would find problematic, that we would find dangerous. We will find those facts out over time,” he conceded. “But as far as Congress is concerned, he’s a whistleblower. He told us what we needed to know.”

Nor have the recent al-Qaeda threats and embassy closings changed Amash’s mind; if anything, he says, these dangers should reinforce our wariness of expansive government powers:

“It’s precisely because we live in this dangerous world that we need protections like the Fourth Amendment,” he said. “The framers of the Constitution put it in place precisely because they were worried that you could have national security justifications for violating people’s rights.”