what is considered the most important power congress holds? collecting taxes electing leaders creating laws determining citizenship

The most important power that Congress holds is creating laws. Congress is the only part of the government vested with the legislative power to make new laws or change existing laws. This core function allows Congress to address issues, shape policies, and govern the country effectively. While Congress also has powers like collecting taxes, electing leaders, and determining citizenship, these are secondary compared to its primary role of lawmaking.