No, This Wasn't Political In The Slightest

Night before Obama flies abroad, Rice bars embassies from aiding candidates

"The night before presumptive Democratic nominee Sen. Barack Obama (D-IL) left for Afghanistan, Iraq and Western Europe for a tour of US bases overseas, Secretary of State Condoleezza Rice issued a cable to US missions forbidding them from holding events for presidential candidates or arrange meetings for them.
Rice issued no such cable prior to foreign excursions by presumptive Republican nominee Sen. John McCain (R-AZ).

In a cable sent late Thursday, according to a copy leaked to the Washington Times, Rice enjoined American diplomats to treat the candidates as "members of Congress visiting in personal or semi-personal capacities," but "with additional restrictions based on rules related to political activity."
"Provide de minimis assistance to the candidate with logistical arrangements," said the cable, according to the Times. "If the campaign staff wants to rent a bus for press, tell them where they can rent a bus."