Zimbabwe fired the starting pistol for election campaigning on Thursday when it formally opened the nomination process to presidential hopefuls ahead of polls due on July 30. The election will be a key test for President Emmerson Mnangagwa, and his main rival Nelson Chamisa from MDC. Candidates seeking to contest next month's presidential, parliamentary and local polls have just one day to submit their candidacy to one of several specially convened electoral courts across the country.