You bet they can, and not just once in a while, either.
A classic example is the eminent domain decision where private property could be seized just so developers and city councils could conspire to profit and "enhance the tax base."
And of course, don't forget the NUMEROUS violations of the second amendment.
...the right of the PEOPLE to keep and bear arms shall NOT be infringed."
EVERY gun "law" or "restriction" is a violation, period.