Trump kids can't vote

I guarantee it's not a year. Lol

Have they never voted before? Aren't they is their 30's?

maybe they needed to register as republicans NY had a closed primary.

They didn't miss the March deadline, they missed the Oct 9, 2015 deadline to change party affiliation.  I find it hard to believe that they've never voted before now.

My first thought was they didn't forget.

They didn't forget. Guaranteed. They know exactly how batshit crazy their father is and how horrible he is as a potential candidate. Likely they are being forced to be a part of the campaign and this is likely one of the few ways they can control their own autonomy.

I also think they didn't forget. Lifelong Democrats? They'd be voting for Hillary if they thought they wouldn't be photographed leaving the voting booth.

and this is the one thing I dislike about voting as an American citizen. It's not a completely private vote. In Canada I came in, they checked off my name and handed me a ballot.  Here in the US this primary was my first vote as a citizen. I also worked the election.  You go up and the very first thing they said was "Are you voting  democrat or republican?" I only voted in the general as there was a tax vote I cared a lot about. I was not ready to declare a party. But why is it anyone's business if I vote democrat/republican or independent? I know they have separate ballots for each party but sheesh.   A person's vote should be 100% private including the party (yes I know you can vote differently then you declare but it's still public knowledge that you identified one way).

A lot of that depends on your state.

Here, in the primary, you don't have to be registered with a party but you do ask for a party's ticket. In general elections, you don't ask for a certain party. You get handed a ballot that lists everyone.

Maybe they are registered as democrats, but they also may be registered as a third party or unaffiliated with any party.

Maybe they chose which party to register with in order to have more influence over local politics. I can't remember NY ever having a presidential primary that actually mattered in my lifetime (at least not a republican primary). Local politics in NY are a world unto their own.

On the plus side Trump says he is getting rid of the Department of Environmental if he's elected. That should be easy since it doesn't exist.

At least here, your affiliation is noted in their records and they provide the ballot that matches their records. They don't ask. Or I should say that I have never heard anyone ask. They have a book with your name/address/affiliation that they match against either your voter id card or driver's license. I fill in a scantron bubble and sign my name under the information to verify it and they hand over the ballot. 

I assumed that it was similar in most other polling places. To be fair, I live in a smaller town where I have been voting in the same location for at least 20 years and generally know at least one of the observers or polling workers. But I can't remember a time where the information has been verified out loud.

This is one of the many reasons I love that Oregon does vote-by-mail.