"I think the fiscal situation in the United States is very worrisome," Harper, a trained economist and right-leaning political leader in his country, told Fox News's Neil Cavuto.
Still, Harper gave Obama cover for the large spending initiatives undertaken by the U.S. government since the onset of the financial crisis and recession.
"President Obama came into office with the United States in a deep, structural deficit position, at a time when fiscal situation -- when deficit spending is required economically," Harper said. "The fact of the matter is that we need stimulative spending now -- and I say that as a conservative."
Harper said that the structural deficit that Obama encountered was "not his fault" and was inherited.
Watch a video of the interview below: