cs1 said:
City of College Station has political campaigning as a defense to its solicitation ordinance, so it is not illegal. I don't think the county has a solicitation ordinance for unincorporated areas. Free speech and freedom of association trumps any HOA rule or neighborhood entry sign when there is not a city/county ordinance prohibiting such.
Many city solicitation ordinances either exempt or include a defense for charitable, religious and political activities.
I've worked both ends of this as a former city employee and door-to-door campaigning for candidates. (Not at the same time, before anyone attacks).
Property rights should trump "free speech" because it is on private property and you have no inherent right to free speech on private property.
Personally I think no one should come onto private property without permission, a legal reason, or agreed upon by the owner.