Ticket prices are up for this year’s glitzy New Year’s Eve bash, but concerns remain over the fusion of Trump’s public responsibilities and private interests. Donald Trump is throwing a lavish party tonight, as he does every New Year, at Mar-a-Lago, his private club in Palm Beach, Florida.But this year, with the host also serving as US president, he faces questions over the conflation of his business interests and his official responsibilities.At $600 for dues-paying members and $750 for their guests, ticket prices are up from last year, when, as president-elect, Trump charged $525 for members and $575 for guests.Last...