1) That Reagan would have difficulty being in the party today. Even a cursory examination of his record in its historical context blows this assertion to smitherines.
2) That’s is now dominated by the radical right. This is CLEARLY demonstrated by the fact that every nominee since Reagan has been a moderate–including the Bush’s; H.W. lost precisley because he didn’t continue Reagan’s policies, was selected as VP because he was moderate, and selected his own VP Dan Quayle because he was a Reaganite (to stem worries from Reaganites in the GOP in 1988). W. governed as a moderate in Texas, and did so also in the White House. He spent like a drunken democrat. McCain and Romney are both self-evidently moderate and to conclude otherwise is either dishonest or ignorance of the facts. To the contrary, Obama was one of the most radically left senators ever, and has attempted to push through equally radical social and economic agendas that are intended to radically reshape the nation.