> we have 2 political parties that dominate most elections
Here in Argentina we use the two-round system (also known as the second ballot, runoff voting or ballotage) to avoid that issue. To win the presidential election, a candidate must get more than 45% votes or 40% AND 10% of adventage over other candidates. If this condition doesn't apply there is a next round where the candidate with most votes wins.
Imagine the following situation:
You got three candidates for the elections: a. Trump (39%) b. Clinton (38%) c. Sanders (23%)
There is going to be a second round, but maybe Sanders voters are going to vote for Clinton to avoid Trump winning. In the current system Trump would have win. You could argue that in the current system Sanders voters would have voted for Clinton but maybe they thought Clinton was going to win since Trump didn't have much chanced.
With the two round system this becomes explicit.
This let's you vote for your favorite and in the second round you pick between the two big candidates.
Here in Argentina we use the two-round system (also known as the second ballot, runoff voting or ballotage) to avoid that issue. To win the presidential election, a candidate must get more than 45% votes or 40% AND 10% of adventage over other candidates. If this condition doesn't apply there is a next round where the candidate with most votes wins.
Imagine the following situation: You got three candidates for the elections: a. Trump (39%) b. Clinton (38%) c. Sanders (23%)
There is going to be a second round, but maybe Sanders voters are going to vote for Clinton to avoid Trump winning. In the current system Trump would have win. You could argue that in the current system Sanders voters would have voted for Clinton but maybe they thought Clinton was going to win since Trump didn't have much chanced.
With the two round system this becomes explicit.
This let's you vote for your favorite and in the second round you pick between the two big candidates.