Sure, the PAs, NDAA, MCA. The Intelligence Authorization Act for FY 2004 (signed the day Saddam Hussein was captured.) See
Fox News Judicial expert Andrew Napolitano speaking to the Future Freedom Foundation conference this year. Because anyone can be deemed an enemy combatant, we have effectively surrendered our right to habeas corpus, the first, second, fourth, and tenth amendments. Also, posse comittatus is dead. I do not believe these powers are being massively abused -- yet. But the potential is there. People involved in investigations are unable to talk or write about their experiences, so you might never know.
All the while the real threat is from illegal immigrants and extremist Islamic immigrants, yet little is being done about those things, seriously. (I'll grant that Duncan Hunter has tried.)
As I have said, I do not think Duncan Hunter means badly with his coauthorship of these unconstitutional bills, but he is naive for having supported them.