A majority of Americans expect Barack Obama to be a one-term president, an assessment on which, in past elections, the public more often has been right than wrong.

Just 37 percent in a new ABC News/Washington Post poll say they expect Obama to win re-election in November 2012; 55 percent instead expect the eventual Republican nominee to win. ABC’s George Stephanopoulos is asking the president about that result in an interview today.

It’s a challenging finding for the president because expectations can fuel voter enthusiasm – precisely the ingredient that led the GOP to its broad success in the 2010 midterms, when charged-up conservatives turned out while dispirited Democrats stayed home.

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