Mexico's first lady says she will seek presidency Mexico City, Feb 10 (EFE).- First Lady Marta Sahagun's confirmation that she will seek the nation's presidency in 2006 has roiled the waters of Mexican politics and prompted a top jurist to say that if she does indeed become a candidate, her husband, incumbent Vicente Fox, should resign before the end of his term. Asked in a television interview Monday night if she would run - a possibility much debated in the media and on the streets in recent weeks - Sahagun replied: "Speaking truthfully, as we say we should, the...