It's official: Amy Klobuchar is Democrats' pick to succeed Gov. Tim Walz

U.S. Sen. Amy Klobuchar sailed to victory in Minnesota's Democratic primary for governor on Tuesday. The big picture: Polling indicates that the four-term senator and 2020 presidential candidate will be a formidable contender in Democrats' bid to hold the open seat this November. Catch up quick: Klobuchar entered the race in late January, shortly after Gov. Tim Walz reversed course and scrapped plans to run for a third term. Walz's exit came amid mounting scrutiny over his administration's…