Federal
It is a unitary state
An example of unitary is system of government is the United Kingdom.
Unitary
A unitary government holds all power at, what we call in the United States, the federal level. There are no issues that the federal government cannot deal with. The opposite of unitary government is the federal government, meaning that there are multiple levels of government. The United States is a federal system of government, with power being shared between the state and federal governments.
true
unitary
unitary
Yes, citizens do vote in a Unitary Government. They vote for Parliament. A Unitary System has a strong central government; the states only have the power that the central government gives them.
confederation
The short answer is that if the united states became a unitary state it would no longer be "united states" but rather the "united state." Perhaps some successor state occupying a portion of what was once the US could be a unitary state, but the likelihood of all the constitute parts of the US voluntarily relinquishing their legislative and administrative prerogative is minute.
yes it has a unitary system