Former US president contradicts himself in his statements about his running mate. The possibilities remain open as Donald Trump and Joe Biden have effectively secured the nomination.

Trump, in complete control of the Republican Party, has suitors swarming. It is common to choose someone who complements the candidate and covers some of his or her shortcomings, writes Juan Pablo Martinez Monsivais, a former US president himself. After the desert journey that Trump overcame, personal loyalty is another ingredient to put in the shaker, he adds.