@farmerman,
The US could adopt the Australian model where it is compulsory by law for all eligible Australian citizens to enrol and vote in federal elections, by-elections and referendums.
Although the fine for not voting is pretty derisory, I think 20 Aus dollars, it still seems to work in terms of getting people out to vote.
The federal election in 2016 having turnout figures of 91% for the House of Representatives and 91.9% for the Senate, now that ain't bad cobber.
I'm laughing to myself just imagining trying to introduce this into the US.
Jesus the Agony Anti's would literally combust.