The 16th, 19th, and 26th amendment changed the relationship between the state and federal government by giving more control to the federal government.
For example, the 16th amendment resulted in the creation of the federal income tax. This resulted in a consistent stream of revenue going to the federal government. Before this time, many taxes were decided by state governments.
The 19th amendment gave women the right to vote. This ensured that all states that had laws against women being able to vote would now have to get rid of these laws.
The 26th amendment gave citizens 18 years or older to vote. This infringed upon the rights of state governments as well, as they were the ones who decided the voting age for citizens within their state.
