Trump, Biden trade barbs amid dueling Iowa campaign visits

President Donald Trump speaks at Southwest Iowa Renewable Energy, an ethanol producer, in Council Bluffs, Iowa, Tuesday, June 11, 2019. (AP Photo/Nati Harnik)

Democratic presidential candidate former Vice President Joe Biden greets the crowd at a town hall meeting, Tuesday, June 11, 2019, in Ottumwa, Iowa. (AP Photo/Matthew Putney)

MOUNT PLEASANT, Iowa — President Donald Trump and Democrat Joe Biden spent Tuesday trading insults — sometimes almost simultaneously— as they stumped across Iowa in split-screen moments that could preview a ferocious fight ahead if the two face off for the presidency next year.