Turks and Caicos Islands:
NA
Tuvalu:
constitutional monarchy with a parliamentary democracy;
began debating republic status in 1992
Uganda:
republic
Ukraine:
republic
United Arab Emirates:
federation with specified powers delegated to
the UAE federal government and other powers reserved to member
emirates
United Kingdom:
constitutional monarchy
United States:
federal republic; strong democratic tradition
Uruguay:
constitutional republic
Uzbekistan:
republic; effectively authoritarian presidential rule,
with little power outside the executive branch
Vanuatu:
republic