John Kerry, the US senate's foreign relations committee chairman, has said it would be "irresponsible" to send more US troops to Afghanistan. Kerry's comments on Saturday came as a deepening election crisis that has placed the Kabul government's legitimacy at stake continues. "It would be entirely irresponsible for the president of the United States to commit more troops to this country, when we don't even have an election finished and know who the president is and what kind of government we're working in, with," said Kerry. "When our own commanding general tells us that a critical component of achieving our mission here is,...