This was not a smooth process. The rise of executive power sometimes hurt important interests and always rubbed against the republican sensibilities that Americans inherited from the founders. From time to time, Congress reaped political benefits from thwarting the president. But today Congress reacts rather than leads.
1 Dehydration can sometimes cause blood pressure to drop. 2  However, dehydration does not automatically signal low blood pressure. 3  Fever, vomiting, severe diarrhea, overuse of diuretics and strenuous exercise can all lead to dehydration, a potentially serious condition in which your body loses more water than you take in.
This happens when blood pressure drops rapidly during changes in body position â usually when changing from sitting to standing â inducing classic signs that the blood pressure is too low, like dizziness, blurry vision, and fainting. Other important causes of low blood pressure include: 1  Heart problems that cause low heart rate, diminished heart strength, or a decrease in the amount of blood supplied to the body.  Normal changes associated with the first and second trimesters of pregnancy.