Former Donald Trump aide Paul Manafort used his presidential campaign email account to correspond with a Ukrainian political operative with suspected Russian ties, according to people familiar with the correspondence. Manafort sent emails to seek repayment for previous work he did in Ukraine and to discuss potential new opportunities in the country, even as he chaired Trump’s presidential campaign, these people said.Manafort had been a longtime consultant for Viktor Yanukovych, the Ukrainian president until 2014, and his Party of Regions.