The Purge: Election Year is the third movie in the franchise which is set in a world where America holds an annual purge, and everything becomes legal including murder on that day. After watching this movie, I'm still waiting for them to properly utilize this world they have created.
Election Year has, well, politics thrown into the mix where Frank Grillo returns as the lead, and this time he's the head of security for the senator, played by Elizabeth Mitchell, who's fighting in the election and wants to end the purge while the evil government opposition is trying to get rid of her during the purge. Couple that in meh execution along with some forgettable subplots and side characters, bad and way over-the-top acting, stupid/nonsensical scenes, and just an overall forgettable experience, and you have another wasteful purge movie (Anarchy was fine, loads better than the other two).
The only characters I had any interest in were the two leads, that's it. Both delivered convincing enough performances, even with the subpar dialogue. Other characters and their subplots had way more focus given to them than it was needed considering all of them were uninteresting and boring and I didn't really care for any of it.
There were some action scenes and craziness that I enjoyed, but it would always be hindered by stupid decisions and bad direction etc. Like this one scene, where a security guy had a semi-automatic sniper rifle, and had a clear view of the protagonist (who had no real cover), and was going at it, but couldn't do any major damage. Almost laughed.
If you like/love the other purge movies, you'll probably like this too. Otherwise, stay away and watch something better. It ain't worth it.