OTTAWA — The official portrait of former prime minister Stephen Harper will be unveiled today on Parliament Hill, 20 years after he won an election that marked the beginning of almost a decade in power for the Conservatives. The unveiling ceremony is scheduled to take place at 4 p.m. ET, with Prime Minister Mark Carney set to deliver remarks. “It’s a very important day, the unveiling of Mr. Harper’s portrait,” said Carney, on his way into a cabinet meeting Tuesday morning. “A chance to reflect on his contributions and how great this country is.” Harper was first elected as prime...