Specter was swept into office in the first Reagan landslide.
Reagan, himself, made no effort to run him out of the party.
If you want to get rid of a member of any Party, that you do not like, you run someone against that person, in the PRIMARY!
It would be wrong for a United States President to dictate, to the grass roots of his or her own Party, who should or should not receive THEIR votes, in a Party Primary.
That would be tyrannical!
If you want to change America, you MUST control either the Democrat Party or the Republican Party.
If you do not want to be a Democrat?
Then you have only one choice left:
Control the Republican Party from the grass roots up!
There is NO OTHER OPTION if you want Conservative government.