The United States insisted Monday it would press ahead with convening talks this week on the devastating war in Sudan, even without the Sudanese government. The US-mediated talks in Switzerland are scheduled to start on Wednesday, but Washington has had no confirmation from the Sudanese armed forces that they are intending to take part. Sudan’s government, whose army has been at war with paramilitaries for nearly 16 months, has voiced concerns over the US approach. “We’ve had extensive engagement with the SAF [Sudanese armed forces], but they have not yet given us an affirmation” on coming to …