Final answer:
Under Putin's leadership, certain parts of the Russian Constitution of 1993 have not been upheld, including restrictions on freedom of the press and political opposition.
Step-by-step explanation:
The Russian Constitution of 1993 was designed to establish a democratic system in Russia after the collapse of the Soviet Union. However, under the leadership of Vladimir Putin, there have been several instances where certain parts of the constitution have not been upheld. One example is the restriction on freedom of the press. Putin's government has implemented laws that limit the ability of independent media outlets to operate freely, thereby curtailing the freedom of the press as guaranteed by the constitution. Another example is the restriction on political opposition. Putin's government has been known for cracking down on political dissent, including arresting and imprisoning opposition leaders, which goes against the principles of political freedom enshrined in the constitution.