STORM LAKE/OELWEIN, Iowa (Reuters) - As
Joe Biden on Saturday finished an eight-day bus tour through the crucial early nominating state of Iowa, one realization loomed large: His biggest challenge to clinching the
Democratic presidential nomination may be coming from Pete Buttigieg, a Midwest mayor less than half his age.
Leading in national polls among
Democrats but trailing in Iowa, where progressive Senators
Elizabeth Warren and Bernie Sanders have won over more liberal, urban and younger Iowans with their fight-the-power messages, Biden, 77, is targeting the state's older, moderate and rural voters.