Canadian Prime Minister Stephen Harper and U.S. President Barack Obama are expected to emphasize the need to keep global economic stimulus money flowing when they meet at the White House on Wednesday, a Canadian spokesman said Monday. “The most important thing is staying the course, making sure that the different stimulus packages are implemented without obstruction and without delay,” Harper spokesman Dimitri Soudas told reporters in Ottawa. The meeting will occur a week before a Group of 20 (G20) summit on global recession and recovery that Obama will host in Pittsburg, Pennsylvania.