protesting what?

Later today is supposed to be the right wing "million person protest"
first, they set their sights high. Not sure why they are looking for a million people. I dont see how they can possibly expect just about 10 percent of the country to show up for this, even if it were the most important thing in the world. It is doomed to failure just because of that. They should have called for 50 or 100k or even shoot big and call for a quarter of a million, but not a million.
Second, what is the protest about? in support ...