A thyroid scan can show the size, shape, and location of the thyroid gland . It can also find areas of the thyroid gland that are overactive or underactive. The camera takes pictures of the thyroid gland from three different angles. The radioactive tracer used in this test is either iodine or technetium.
The current U.S. Senate has 54 Republicans and 45 Democrats (including one independent). The 2016 Senate election takes place on November 8, 2016. There are 34 seats up in 2016, of which 24 are held by Republicans. Democrats will need to gain 4 or 5 seats to take control.
There are 24 Republican seats and 10 Democratic seats up for re-election. In 2016, the Democratic Party will need to pick up five seats in the Senate in order to regain the majority they lost in 2014. The majority of the Republican incumbents up for re-election in 2016 were first elected in 2010 during the tea party movement.