President Donald Trump is promising more payments to voters just ahead of the Nov. 3 midterm elections — this time, to more than 20 million seniors, giving them $90 each to help pay for Medicare premiums. The announcement, made late Friday night by Trump on social media, comes after the president last month said about 1 million people would get rebate checks of $500 for Affordable Care Act premiums. He has also promised on the campaign trail to send every American adult $5,000 if Republicans...