There is an upcoming demonstration of indeterminate size and not much information about major conservatives either backing or speaking. It is time for President Trump to up the pressure and, perhaps, use this demonstration as a vehicle to call his base to DC on a large scale. The Members of the House and Senate need to see vast support for the President and understand what might happen if they carry out their coup.
The basic information is available at: https://trumpmarch.com
There is very little information on that site. It appears to be a call for volunteers and a fundraising pitch.
The project seems very ambitious. My assessment is "too little, too late". A Leftist demonstration would unveil their website with transportation captains already in place, along with sign-up pages for at least a half dozen States and some free lodging available. Of course, the Leftists have a very skilled professional cadre of full-time organizers, many of whom are paid a modest living wage for their work.
We aren't going to beat them with street demonstrations.