Sen. Jon Tester, D‑Mont., is skipping the Democratic National Convention in Chicago this month when the party will rally around Vice President Kamala Harris as the Democratic presidential nominee, opting to stay in Montana ahead of a tight race to keep his Senate seat. A spokesperson for the longtime Montana Democrat told Fox News Digital that Tester “plans to spend his August farming and meeting face to face with Montanans.“Harris, who formally became the Democratic nominee for president last week, has yet to receive Tester’s endorsement. ‘DEEPLY DISAPPOINTING’: DURBIN CALLS ON AUSTIN TO REINSTATE CONTROVERSIAL PLEA DEALS FOR 9/11 TERRORISTSWhen asked about a potential endorsement last week, he told Fox News’ Kelly Phares, “We’re working on my race right now, focused totally on that.”“We’re going to win. And we’ll deal with the presidential race when we have …