I will tell this Missouri lawmaker the same thing I say to anyone who calls for Trump's assassination. 

"Well, that results in Pence, so what good would it do? Oh yeah, and it gives the right a Martyr. And if you think the answer to Pence is more bloodshed, it's Republicans all the way down so you're gonna have to kill a whole bunch of Righties before you get a chance to get a Leftie in power, and...they'll face a unified, enraged Right-Wing. Not smart."