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.
How Anxiety Can Cause Low Blood Pressure. Stress is one of the most common causes of short bursts of high blood pressure. Those with heart conditions are often told to be as careful as possible about stress and anxiety, because the amount of pressure it places on the heart can actually become very dangerous.