Someone who because they are naïve or just plainignorant consistently votes against their own self-interests
Joe is a suicide voter he used to have a good job at a factory with a strong union that provided excellent pay and benefits, but he voted for an anti-union governor who busted up the union, resulting in a huge drop in pay, then he voted for a "free trade" Congressman who wants to move all factories to China. Now unemployed and receiving healthcare through the state exchanges created under the Affordable Care Act he plans to vote for a president who wants to take away his healthcare.
when someone is murdered and then arranged in such a way to make the death seem like a suicide. the victim may also be forced to take his own life so that the real culprit leaves little to no evidence of wrongdoing. authorities rule the cause of death to be a plain old suicide which often means that no investigation is preformed.
the key witnesses were all suicided before they could testify. i guess they all were depressed or something. oh well. case dismissed!