Nixon tried to appeal to Southern Democrats by influencing "(A) social security benefits" which were sought after in many ways by Democrats in the South.
Political changes are perhaps the most common way to enact change in a nation, because these changes almost always bring about social and economic changes.
The fourth amendment prohibits searching homes without warrants. A good way to remember this is: "You cannot come forth into my home without a warrant."
Checks and balances work protect us from the govt getting more powerful than the other