The US Senate has sole authority to hold impeachment trials. If the House vote passes by a simple majority, the defendant is impeached, and the United States (Supreme Court) must preside over the Senate trial of the President.
How does one rule out other possible causes of the positive tTG blood test? We rule out other causes of elevated tTG by evaluating the other known possible causes, such as liver diseases or the concomitant presence of other autoimmune disorders. If those have been ruled out, the next likely cause is that you are not living 100% gluten-free.
HCG is the hormone that  pregnancy tests  detect. HCG increases to a peak at around 12 weeks. It has mild thyroid stimulating effects and, as a result, can cause some symptoms of hyperthyroidism. HCG is in part responsible for the nausea during the first trimester. In situations of multiple pregnancies (twins, triplets) HCG levels are even higher, and symptoms can be more pronounced. Temporary subclinical (no apparent symptoms) hyperthyroidism occurs in 10-20% of normal pregnant women during this period, and these women typically do not require treatment.