Recently, a bizarre scene unfolded on the floor of the House of Representatives that would have shocked the framers of the Constitution.

In his State of the Union address, President Obama announced that he had decided to go it alone in areas where Congress refused to act to his satisfaction. In a system of shared powers, one would expect an outcry or at least stony silence when a president promised to circumvent the legislative branch.

Instead, many senators and representatives erupted in rapturous applause; they seemed delighted at the notion of a president assuming unprecedented and unchecked powers at their expense.

Last week, Obama underlined what this means: The administration unilaterally increased the transition time for individuals to obtain the level of insurance mandated by the Affordable Care Act. There is no statutory authority for the change - simply the raw assertion of executive power.

The United States is at a constitutional tipping point: The rise of an uber presidency unchecked by the other two branches.

This massive shift of authority threatens the stability and functionality of our tripartite system of checks and balances. To be sure, it did not begin with the Obama administration. The trend has existed for decades, and President George W. Bush showed equal contempt for the separation of powers. However, it has accelerated at an alarming rate under Obama. Of perhaps greater concern is the fact that the other two branches appear passive, if not inert, in the face of expanding executive power.

James Madison fashioned a government of three bodies locked in a synchronous orbit by their countervailing powers. The system of separation of powers was not created to protect the authority of each branch for its own sake. Rather, it is the primary protection of individual rights because it prevents the concentration of power in any one branch.

In this sense, Obama is not simply posing a danger to the constitutional system; he has become the very danger that separation of powers was designed to avoid.

A glance at recent unilateral moves by Obama illustrates how executive power has expanded, largely at the cost of legislative power.

The suspension of a portion of the ACA is only the latest such action related to the health-care law:

• The heart of the health-care law was a set of minimum requirements for insurance plans. After Obama was embarrassed by the cancellations of millions of nonconforming plans (when he had said no one would lose a plan they had and liked), he created first one temporary exemption and then, last week, another, adding two years to the compliance deadline set by law.

• On his own authority, Obama also chose other dates for compliance with the employer mandate.

• Congress ended a subsidy for members of Congress and their staffs so that they would obtain insurance under the ACA on the same terms as other citizens. Obama ordered that the same subsidies would continue, in defiance of the law.

I happen to agree with many of the president's policies. However, in our system, it is often more important how we do something than what we do.

Whatever problems we face today in politics, they are of our own making. They should not be used to take from future generations a system that has safeguarded our freedoms for more than 200 years.

Jonathan Turley is a professor of law at George Washington University.