Too bad I didn't see this earlier.. yes, it is possible. I've never done it, but I was recently given a brief rundown on what hootsuite (a local social media management company) can do - and scheduling posts to various social media platforms is one of it's features. A basic personal use account is free. From what I know of it, it's an all-in-one social media management site so that businesses can broadcast their posts across all platforms w/o having to manually enter them into Facebook and Twitter and Google+. There are other features, too, I'm sure.
Anyways: https://hootsuite.com & select "Free" under the "Plans" tab.
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No
for supporting trump. Because doing so is deplorable.