By Lesley Wroughton WASHINGTON (Reuters) - Former U.S. envoy to Syria Robert Ford is being considered as Washington's next ambassador to Cairo, sources familiar with internal discussions said on Sunday as U.S. and European mediators sought a peaceful resolution to Egypt's crisis. Ford was described as a leading candidate for the post, according to two sources who spoke on condition of anonymity. The State Department declined to comment and Ford did not respond to emails. ...