Should Johnson and Weld get money (especially Koch-aine) behind them, then they are going to show what good campaigners they really are. Johnson and Weld are comparatively liberal for Republicans, but they are more orthodox Republicans than Trump. Seasoned politicians (both Johnson and Weld have held one of two the offices that successful candidates for the Presidency usually have -- Governor -- they both have an edge over Trump.
They should do better than Anderson in 1980 and Perot in either 1992 or 1996 based upon their prior achievements in political life.
Yea I'd like to see them do well but I don't see them getting 20%.