Currently, the strongest branch of America's government is the Executive branch.
While the branches were once co-equal, the Presidency has taken on a life of its own with the ability to wage war without Congressional approval and to dictate the terms to Congress without much push back.
The correct answer to this open question is the following.
The branch of government that I believe has the most power overall is the executive branch.
The President of the United States is the leader of the nation. He is the chief of the Cabinet and supervises many counselors in the White House. He is the Commander-in-Chief of the Armed Forces (Army, Navy, and the Air Force). He also is the Chief Diplomat of the country and has the power of veto laws. That is why I think the executive branch is more powerful than the judicial branch and the legislative branch.
Explanation: Social Reform is the belief that through gradual changes and within existing institutions one can fundamentally change the economic system and political structures of society.