suppressive effect on pituitary TSH secretion (9). They also found that it was much more potent than T4 (10), although it was less abundant than T4 in the thyroid gland (11). Based on these findings Gross and Pitt-Rivers hypothesized that T3 was the active peripheral thyroid hormone and T4 was its precursor.
(Photo: Tom Tingle/The Republic) U.S. Sen. Jeff Flake may have a long two years ahead of him. Up for re-election in 2018, the first-term Arizona Republican is already under attack from the right and the left.
For those votes, Trump may need to dip into the well of eleven Democratic Senators from states he carried in 2016, ten of whom are up for reelection in 2018: Joe Manchin, Claire McCaskill, Heidi Heitkamp, Jon Tester, Joe Donnelly, Bob Casey, Bill Nelson, Sherrod Brown, Debbie Stabenow, and Tammy Baldwin.