BANGOR, Maine — Maine Democrats on Saturday quickly coronated Troy Jackson the party's Senate nominee after this month's spectacular implosion of ex-candidate Graham Platner in the high-stakes Senate showdown with longtime Republican Sen. Susan Collins. Jackson, a former state Senate president, was elected in a landslide at the Maine Democratic Party's nominating convention in Bangor. "Maine Democrats have seemingly made their choice, and they're just going to have to ride with it." "The good news is that we have upset opportunities in places like Texas, Iowa and Alaska," added the consultant, who works with centrist Democratic Senate candidates. Similar to Platner, Jackson is running on a platform aimed at working-class voters.