Balsam of Peru comes from the trunk of a tree grown in Central and South America. It is a natural resinous balsam that contains a mix of a number of substances that are related to Cinnamon, Vanilla and Clove fragrance and flavourings.
In the 38 states with either a four-year term or a 2-4-4 term, 27 states have staggered elections so that approximately half of state senate seats are up for re-election during the state's general elections that take place every two years.
Currently, the president can only serve two terms of four years. When Franklin D. Roosevelt was president, there was no limit on how many terms the president could serve. But in 1951, an amendment was added to the US Constitution limiting the president to only serving two terms. This source has the whole text of the US Constitution.