Answer:
The phrase is referring to the power struggle going on between the President and the Congress. If the conflict is not resolved it might come down to the voters.
Explanation:
The way the government works is by a system of checks and balances. This means that power is divided into three branches: executive, legislative, and judicial. This system allows each branch to keep the others in check. Clashed and power struggles between the branches is not something new, but the recent issues are really putting the system to the test.
Currently the system is in crisis because the Trump administration is at odds with Congress. There are several alternatives for the situation to be resolved, but some, like John Fortier, suggest that it should be decided by the voters. That's why he says, "The people can speak. The people can decide if the President is right or Congress is right."