Haha. Louisiana flips. Haha. Tennessee flips. Arkansas, too. Kentucky. West Virginia.
As late as 1996 they had gone twice for Bill Clinton. Hillary Clinton has been shown leading such luminaries as Paul Ryan and Marco Rubio in two of those states (KY, LA -- I have nothing else on the others) even though Barack Obama is wildly unpopular in those states.
Barack Obama won nationwide despite losing those states by margins similar to those of George McGovern and Walter Mondale in blowout losses. Need I tell you why? Take out that reason and Barack Obama wins with a percentage of popular votes characteristic of Eisenhower in the 1950s or Reagan in the 1980s.
Rick Santorum was a Senate enforcer for an unpopular President. Pennsylvania voters rejected him 59-41 in 2006. If he should win the Republican nomination he has plenty of stuff -- like his voting record -- to be used against him.
Pennsylvania looks like the tipping-point state of 2016. He could win Pennsylvania -- in its Republican primary. In the general election he loses 59-41, which suggests what the national election could be like. Hillary Clinton will still get a lock on the black vote, but Southern white people will not be voting against a black man as a nominee.
Does she get the Clinton-but-not-Obama vote of the 1990s or the Carter-but-not-Obama vote of the 1970s? The latter wins the whole of the former Confederacy except Virginia (the only former-Confederate state that Carter did not win)... and we all know how Virginia is drifting. Santorum has little to offer the South.