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.
Some medical conditions can cause low blood pressure. These include: 1  Pregnancy. 2  Because a woman's circulatory system expands rapidly during pregnancy, blood pressure is likely to drop. 3  This is normal, and blood pressure usually returns to your pre-pregnancy level after you've given birth.
In addition, dehydration, diabetes, and certain heart problems like arrhythmias can cause low blood pressure. One specific type of low blood pressure is orthostatic hypotension. It occurs following a sudden change in body position, most often from lying down to standing, although sometimes sitting up after lying down, or just bending over to pick something off the floor while standing can trigger it.