And you have that luxury. You don't have to get 50+% of the vote to get elected to the Quarterback position of your armchair.
On the other hand, few politicians would survive the publicity bloodbath of watching countless news reporters show footage of 8 million illegals rounded up into temporary internment camps or marched home in ten mile long columns along our highways.
SCOPE. The problem with using such brute force round up tactics is the sheer scope. Round up 8 million, i.e. 2 million more than the NAZIs rounded up in WW2, and you are going to get such bad publicity that Adolph Eichman would look like a softy in contrast.
And *elected* politicians in the real world can't survive such bad press.
In the meantime, enjoy your unelected position upon the top of your armchair...