The First Amendement (Freedom of Speech) was the basis for Charles Schenck's 1919 Supreme Court arguments that his distribution of flyers and leaflets during WWI to promote draft resistance among young men was Constitutional.
Schenck was arrested under the Espionage Act of 1917. The Supreme Court upheld the decision finding that draft resistance in the midst of WWI was unconstitutional.
A poll tax could prevent someone from voting if they are too poor to be able to afford to pay the tax. A literacy test could be used if the person didn't have a formal education that taught them how to read.
