That would have no impact on elections being close. There'd still be a marginal voter and the candidates would still vie for their vote. The reason for tight ma

That would have no impact on elections being close. There'd still be a marginal voter and the candidates would still vie for their vote. The reason for tight margins is because modern polling and statistical techniques are both so good. It is easy for people to figure out when they are losing and change their tactics. Changing the voting system doesn't alter that dynamic.