Federal law and treaties, so long as they are in accordance with the Constitution, preempt conflicting state and territorial laws in the 50 U.S. states and in the territories. However, the scope of federal preemption is limited because the scope of federal power is not universal. In the dual-sovereign system of American federalism (actually tripartite because of the presence of Indian reservations), states are the plenary sovereigns, each with their own constitution, while the federal sovereign possesses only the limited supreme authority enumerated in the Constitution. Indeed, states may grant their citizens broader rights than the federal Constitution as long as they do not infringe on any federal constitutional rights. Thus, most U.S. law (especially the actual "living law" of contract, tort, property, criminal, and family law experienced by the majority of citizens on a day-to-day basis) consists primarily of state law, which can and does vary greatly from one state to the next.
Most U.S law, the kind of law we live everyday, consists of what kind of law?
state law

Besides parents, Liu Shaokun (), a Sichuan school teacher, was detained on June 25, 2008 for "disseminating rumors and destroying social order" about the Sichuan earthquake. Liu's family was later told that he was being investigated on suspicion of the crime of inciting subversion. Liu had travelled to the Shifang, taken photos of collapsed school buildings, and put them online. He had also expressed his anger at "the shoddy tofu-dregs buildings" () in a media interview. He was ordered to serve one year of re-education through labor (RTL). According to the organization Human Rights in China, Liu has been released to serve his RTL sentence outside of the labor camp.
What did Liu Shankun do with the pictures he took of collapsed schools?
put them online

The period saw several important technical innovations, like the principle of linear perspective found in the work of Masaccio, and later described by Brunelleschi. Greater realism was also achieved through the scientific study of anatomy, championed by artists like Donatello. This can be seen particularly well in his sculptures, inspired by the study of classical models. As the centre of the movement shifted to Rome, the period culminated in the High Renaissance masters da Vinci, Michelangelo and Raphael.
What did Donatello study that inspired sculptures?
classical models