link from .gov site?Really, I shouldn't worry about Trump supporters voting twice and getting arrested...
It's perfectly legal to vote by mail and in person.
Your in person vote overrides your write in vote
How stupid are you?
Interesting. Unlike you I have intellectual curiosity. So I Googled it. It varies by State. Actually in most States, they ignore your vote at the poll or don't let you vote if you voted absentee. In some States you can change your vote but you have to contact the election commission and have your absentee vote nullified to do it. In others you can go vote and as I said your in person overrides your absentee. But you can't vote twice, the OP is a canard.
As for links, since you're arguing the OPs unsubstantiated position, on principle I reject your prove you wrong demand. You prove you're right. Obviously you can't, no State lets you vote twice, it's only a question as I said of whether you can change your vote or not.
Sad testament to public schools, you want to be spoon fed information, not find it yourself