US President Donald Trump said on Friday that his son Donald Trump Jnr has told him he would pay back a Russian oligarch who bankrolled wedding celebrations for him in the Bahamas in May.Democrats in the US Congress launched an investigation this week into reports that Umar Kremlev, a wealthy Russian businessman and president of the International Boxing Association, paid hundreds of thousands of dollars for the wedding festivities.ProPublica, which first reported Kremlev’s involvement, said...