Kamala Harris picked Tim Walz as her running mate Tuesday, opting for the Minnesota governor as the partner most likely to complement her in a historic — and bruising — bid for the White House. Walz had been on a shortlist with a string of other Democratic figures seen as broadening Harris’s appeal as she sprints into the contest against Donald Trump. Aiming to make history as the first woman president, Harris — already a trailblazer as the first female and first Black and South Asian vice president — has little time before Election Day on November 5. The choice was first reported by CNN e…