What other amendments have expanded sufrage in the US?

Answer 1

In addition to the 15th Amendment, which prohibits denying the right to vote based on race, and the 19th Amendment, which grants women the right to vote, the 24th Amendment eliminated poll taxes in federal elections, ensuring that financial barriers could not prevent citizens from voting. The 26th Amendment further expanded suffrage by lowering the voting age from 21 to 18, allowing younger citizens to participate in elections. These amendments collectively enhanced democratic participation in the United States.