MindzEye
Wayward Ditch Pig
Does Twitter really sway a persons vote? That is one of the last places I would consult when trying to decide who to vote for or against.
To be fair dear, I don't think you're their target demographic.
Where this becomes a problem though is when someone with a maybe a few fringey ideas starts to have them heavily reinforced by seeing dozens to hundreds of replies to tweets that they kind of agree with but it's an idea that might be socially unacceptable (for whatever reason, racism, sexism, etc). This confirms the relevance of the idea in the head of this very real person and with enough exposure to this online, they will start to believe that the idea (however repugnant it might be) has more public support than it really does. Do enough of this with enough somewhat codependent thoughts/ideologies and you can absolutely sway the opinions of very large groups of people. Think of it as old school propaganda, but instead of paying actors 10 bucks each to show up at your political rally, you can pay 10 bucks for 10,000 fake people to support you online, attack your opponents with memes, etc. It's just old school manipulation upgraded to use modern tools.