He shows a fascination with science, an all-too deliberate decision-making demeanor, an adherence to logic and some pretty, ahem, prominent ears.

They all add up to a quite logical conclusion, at least for "Star Trek" fans: Barack Obama is Washington's Mr. Spock, the chief science officer for the ship of state.

"I guess it's somewhat unusual for a politician to be so precise, logical, in his thought process," actor Leonard Nimoy, who has portrayed Spock for more than 40 years, told The Associated Press in an e-mail interview. "The comparison to Spock is, in my opinion, a compliment to him and to the character."

Until now.

Obama's Spock-like qualities have started to cause him political problems in real world Washington. Critics see him as too technocratic, too deliberative, too lacking in emotion.

Obama's protracted decision-making on a new war strategy in Afghanistan, for example, prompted criticisms that he's too deliberate. Former Vice President Dick Cheney, former vice presidential nominee Sarah Palin and other conservatives faulted Obama for "dithering."

While it's the slow decision making that has conservatives upset, especially when it comes to national security, it's the science content of the presidential agenda that have the geeks insisting he's gone where no nerd has gone before.

Obama was a lawyer, organizer and author before he turned politician. So his interest in science wasn't as obvious until he reached the White House. Now, privately he's known to relish the ability to call smart people, especially scientists, to come to the White House to talk about their fields. The more obscure and complicated the field, the better to feed the inner science geek.

Out in public, Obama turns the Bunsen burner up a notch, playing a combination of high school science teacher and math team cheerleader.

Last week, for example, the president announced that the White House would hold an annual science fair as part of a $260 million private push to improve math and science education.

"We're going to show young people how cool science can be," Obama said. "Scientists and engineers ought to stand side by side with athletes and entertainers as role models."

That was just the latest in a science-heavy fall semester at what sometimes seems to double as the White House Institute of Technology.

One October evening, 20 telescopes and an inflatable dome with a three-dimensional tour of the universe were set up on the White House lawn. The occasion was a star party for 150 middle-schoolers that also showcased moon rocks, a couple of astronauts, several astronomers and even two science teachers dressed as Isaac Newton and Galileo.