DENVER (AP) — An apparent attempt by a voter in Colorado to tamper with a voting machine during the state’s primary this summer has heightened concerns among election officials and security experts. They worry that conspiracy theories related to the 2020 presidential election could inspire some voters to meddle with — or even attempt to sabotage — election equipment. Even unsuccessful breaches, like the apparent one in Pueblo County, could become major problems in the November general election, when turnout will be greater and the stakes higher. They could cause delays at polling places or sow the seeds of misinformation campaigns.