... as popular as a rattlesnake in a piñata.
Now hang on, I can see that catching on. Instead of an election we could just give Clinton and Trump each one stick and let them go at the piñata simultaneously. We'll keep the rules simple, no antivenin allowed, survivor wins.
Wait, I just realized the poor rattlesnake doesn't stand a chance being the least venomous of the three. I guess it's back to the caged death match idea then.