President makes offer that would cost US over $1tn and asks voters to ‘pretend that I’m on the ballot’ despite being deeply unpopular among electorateDonald Trump pledged to pay every adult citizen in the US $5,000 if Republicans retain the House and Senate in the midterm elections, during a marathon speech at the Republican midterm convention in Dallas in which the president assailed Democrats as “radical” and defended his unpopular war in Iran.The outlandish proposal, which would cos