Almost all of the WOD for one. All firearms laws except for simple excise taxes for another. All federal laws regarding the purchase and posession ages for tobacco and alcohol (not taxation), as these should be 9th and 10th ammendment matters left to the people of the various States. Routine surveilance (without specific warrant) of the general populations banking and communications activities. FBI, ATF and other Federal agency investigation into crimes which occur strictly within State boundaries and do not genuinely affect interstate commerce or Federal activity or property (such as Post Offices). Care to go on? I'll end up naming about three fourths of what the Federal government is doing, so it could be a really long list.