One formal method of amending the constitution is to get two thirds of both houses and two thirds of the states to agree and then have it ratified. Another method is to get three quarters of the state legislatures to approve.
One informal method is executive orders, which are orders by the president on how they are going to implement certain actions, an example of this is former president Obama's immigration laws. Another method is by judicial review, an example of this is that it does not say anything in the constitution about separation of church and state but according to judicial review that is one of the cornerstones.
Informal methods are used more often than the formal amendment process because they are easier to do.
One informal method is executive orders, which are orders by the president on how they are going to implement certain actions, an example of this is former president Obama's immigration laws. Another method is by judicial review, an example of this is that it does not say anything in the constitution about separation of church and state but according to judicial review that is one of the cornerstones.
Informal methods are used more often than the formal amendment process because they are easier to do.