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.
GGT serum measurement provides a very sensitive indicator of the presence or absence of hepatobiliary disease. However the usefulness of measurement of serum GGT is limited by its lack of specificity. Drugs such as phenytoin and barbiturates may cause high GGT levels (2). The reported sensitivity of a raised GGT for detecting alcohol ingestion has ranged from 52% to 94% (3,4). The linked page GGT in hepatobiliary disease details hepatobiliary causes of a raised GGT. Reference: (1) Goldberg DM, Martin JV (1975).