"I will applaud President Obama if he one day does something that earns him the Nobel Peace Prize, but he hasn't done that yet, and if they want to honor this symbolically, let them honor the people of America that elected Barack Obama," Pletka said.
Obama will be joined in Oslo by his half-sister, Maya Soetoro-Ng, and his brother-in-law, Conrad Ng, who will attend the Nobel ceremony.
The White House said this week it is likely his other sister, Auma Obama, would meet him there as well.
The award comes with a $1.4 million prize, which the Obamas will donate to charity. Gibbs said that while "a series of charities are being looked at," no final decision has been made.
The nomination process is kept secret, and it may be 50 years before the world finds out who nominated Obama.
Many U.S. presidents have been nominated for the Nobel Peace Prize but never won, among them presidents William Howard Taft, Warren G. Harding, Herbert Hoover, Franklin D. Roosevelt, Harry Truman and Dwight D. Eisenhower, and foreign ministers Charles Hughes and John Foster Dulles.
Jimmy Carter won in 2002, after his presidency.