(CNN) - White House Press Secretary Robert Gibbs on Monday would not disclose the total cost of President and Mrs. Obama's weekend foray to New York City, but said the first couple would have taken a commercial flight to the Big Apple if the Secret Service allowed.
"I think the president, would, could he have, based on the Secret Service, he would have taken the shuttle," Gibbs said. "But I would say that the costs are proportionate with travel for presidents and I would encourage you to look up previous coverage on travel costs because they are analogous."
Some Republicans, including the Republican National Committee, have criticized Obama over the trip, arguing that it was improper for the president to enjoy a weekend of leisure in New York City - which included taking in a Broadway show - as General Motors was prepared to file bankruptcy papers Monday.
Republicans have also questioned the cost to tax-payers for the brief excursion - which included three Gulfstream-size planes to transport the presidet's security detail, staff, and White House reporters.
"If President Obama wants to go to the theater, isn't the presidential box at the Kennedy Center good enough?" RNC Press Secretary Gail Gitcho said Saturday.
Asked in the White House briefing if there was any "precedent for the president and first lady to take an out of town date night..not connected to a…previous planned event," Gibbs responded: "You've got probably more researchers than I do."