Fresh off his first public tours of Iowa, New Hampshire and South Carolina, the Republican White House prospect has settled on an early approach for dealing with skeptics on the right, casting himself as a practical but "principled conservative," particularly when explaining his immigration and education positions that put him at odds with the GOP's most conservative factions. Bush's approach is a risky one in a Republican primary process where the GOP's most conservative voters wield considerable influence. In the early voting states, Bush has explaining his endorsement of Common Core education standards and his call for an immigration overhaul first by contrasting his stance with Obama, then framing his argument as true to conservative priorities. [...] he wants to "give people a path to earned legal status over a long period of time." In Myrtle Beach, when one local GOP activist bemoaned that "illegals" will get "$1 trillion in benefits," Bush skeptically asked for his source and gave the questioner his personal email address to send him the proof. [...] Cary Powell, a financial services executive in Myrtle Beach, liked Bush's presentation but said he will have to "come up with some sound bites" to use on the debate stage, where he won't have 10 minutes to detail his immigration position. On education, Walker and another potential rival, Louisiana Gov.