I believe that the answer is no. Mandatory voting would infringe our right to be American. People have reasons why they choose not to vote or why they can't vote. So, we as the people of America should not violate the American people's right to choose to abstain their vote.
This could become a tool for retribution: example IRS NSA ect. The government should not have that much power . Just the thought may dissway potential voters from even registering. Who will pay for all the people who still dont have computers. What about the mentally handicapped who will decide who they will cast there votes.
Our country is based on freedoms. People are free not to engage in the political process if they so choose. Those people that choose not to participate should police themselves to not complain about the outcome, but making voting mandatory would only result in disinterested, uninformed people making the choices and that is not a good way to elect a president.