Understanding your blood oxygen levels when you are at rest is something that you need to do if you want to make the most of the oxygen that's entering your body. Normal blood oxygen levels for the average American is about 90 to 100 percent oxygen saturation.
The President is responsible for implementing and enforcing the laws written by Congress and, to that end, appoints the heads of the federal agencies, including the Cabinet. The Vice President is also part of the Executive Branch, ready to assume the Presidency should the need arise. The Cabinet and independent federal agencies are responsible for the day-to-day enforcement and administration of federal laws.
Presidents may urge Congress to pass new laws or veto  bills that they do not favor.    Party leader    Roles: In this role, the president helps members of his political  party get elected or appointed to office. The president campaigns  for those members who have supported his policies. Chief of State-the ceremonial head of the government and the symbol of national unity. 2  Chief Executive-which is responsible to see that the laws of the federal government are enforced. 3  Chief Legislator-seeks to influence the lawmaking process, signs bills into law or vetoes them.