paul slogan will underscore a tuesday presidential campaign launch .
he 's battling perceptions that he has softwned some of his once-rock-solid libertarian positions in order to build broad electoral appear .
paul was for ` containing ' isis , and now says he supports military action ; he was ` a judicial activist ' in constitutional cases but now complains judges are ` out of touch '
iowa republican party official says the senator 's claims to washington-outsider status ` wo n't sell in iowa ' although it might work for a governor .