Two candidates for an open South Anchorage state House district said Friday that they were dropping out of the race and endorsing opposing candidates. The primary race for the seat, which is open due to the retirement of Republican Rep. Laddie Shaw, featured one nonpartisan candidate and three Republicans. Under Alaska’s top-four primary, all four could have advanced to the general election, but the third- and fourth-place finishers announced they would drop out and endorse dueling candidates.