Supreme Court nominee Brett Kavanaugh has frequently supported giving the U.S. government wide latitude in the name of national security, including the secret collection of personal data from Americans.

It's a subject Democrats plan to grill Kavanaugh about during his confirmation hearings scheduled to begin next Tuesday. Beyond his writings as an appeals court judge, some senators suspect Kavanaugh was more involved in crafting counterterrorism policies during the George W. Bush administration than he has let on.

Kavanaugh stated in past congressional testimony that he wasn't involved in such provocative matters as warrantless surveillance and the treatment of enemy combatants in the years immediately after the Sept. 11, 2001, terrorist attacks.

But legal experts say he could shift the court on national security issues, if he is confirmed to replace retired Justice Anthony Kennedy.

Stephen Vladeck, a University of Texas law professor whose expertise includes national security and counterterrorism, cites opinions he says show Kavanaugh "is a lot less willing (than Kennedy) to look at international law as a relevant source of authority and constraint." He said on matters such as Guantanamo detention, Kavanaugh is "much more deferential to the executive branch in this context than Kennedy would have been."