There is nothing truly consensual about government. It is always and everywhere based on force, intimidation, and violence. When the founding generation formed a confederacy with the Articles of Confederation, and later the Constitution, it was at least a voluntary union of the states. The citizens of each state understood that their state, and all others, was free and independent and sovereign. They were free to participate in the union, or not.
~Malice Toward All, Charity Toward None: The Foundations of the American State
Whenever I start pointing out the reasons that elected government is a bad thing, or even suggest limiting the franchise, people almost invariably recite the phrase, "the consent of the governed".
My usual retort is that I didn't consent to be governed by people chosen by college students and atheists.
That retort really ought to demonstrate the fallacy of the entire argument. Democrats don't consent to be governed by Republicans who win elections, or vice versa. None of us consent to the rules of the FDA, DMV, EPA, or dozens of other power-mad government agencies, though we follow them if we wish to stay out of prison.
There is no such thing as the consent of the governed, unless you count "not blowing up Capitol Hill" as "consent". Government is about force. The talk about "the consent of the governed" is rhetoric intended to make the subjects of a democracy feel as if they are not sheep being shorn until time for the barbecue. Time for adherents of elected government to come up with a better argument.