Cities in the US are finally seeing easing in office and retail vacancies after years of a post-pandemic crunch in the commercial real estate space. However, for mid-sized cities like Portland Oregon the story is a little different. Empty store fronts, vacant office buildings, and a struggling downtown isn't just an eye sore, its having a real impact on the city's bottom line. CNBC's Diana Olick talks the city's plans to bring foot traffic back to its downtown.