As much as President Obama’s strongest supporters dislike Obama’s predecessor, they’re unlikely to enjoy Michael Barone‘s latest column about the similarities between the 2004 and 2012 elections.

Both of the elections involved incumbent presidents with approval ratings hovering around or just under 50 percent facing challengers who were rich men from Massachusetts (though one made his money and the other married it).

In both cases, the challenger and his campaign seemed confident he was going to win — and had reasonable grounds to believe so.

In both elections, the incumbent started running a barrage of negative ads defining the challenger in the spring. And in both elections, the incumbent had at least one spotty debate performance.

In both elections, each candidate concentrated on a more or less fixed list of target states, and in both elections the challenger depended heavily on outside groups’ spending that failed to achieve optimal results.

The popular-vote margins were similar — 51 to 48 percent for George W. Bush in 2004, 51 to 47 percent for Barack Obama in 2012.

The one enormous difference was turnout. Turnout between the 2000 and 2004 elections rose from 105 million to 122 million — plus 16 percent. Turnout between the 2008 and 2012 elections fell from 131 million to 128 million — minus 2 percent.