I'm not sure if this is what freedomjusticeruleoflaw means by "there is no constitutional right to vote". The 19th amendment restricts "the United States or any state" and empowers Congess to enforce this through legislation. Did you just mean this as a prompt to examine the meaning of "United States"?
The framers didn’t put a ‘right to vote’ under the bill of rights because they were forming a constitutional republic not a democracy. Just look at what’s happened to our liberties as the voting franchise keeps expanding. That’s right...