DETROIT (AP) — United Auto Workers President Shawn Fain said Friday that while Detroit’s automakers have increased their wage and benefit offers, he believes the union can gain more if it holds out longer in its contract talks. In a Facebook Live appearance, Fain didn’t announce any more factories to add to those that have been on strike for up to five weeks. But he warned that the UAW could announce such an expansion of its strikes at any time, depending on how much progress it makes in its negotiations with the automakers.