After U.S. President Donald Trump announced a withdrawal from Syria, the House of Representatives overwhelmingly passed a resolution denouncing it as "a benefit to adversaries of the United States government, including Syria, Iran and Russia."

Six days later, Mitch McConnell, the Republican leader of the Senate, introduced a similar resolution. "If not arrested," he said, "withdrawing from Syria will invite more of the chaos that breeds terrorism and create a vacuum our adversaries will certainly fill."

Such bipartisan agreement is rare in Washington these days. But it underestimates the wisdom of Trump's decision, the benefits for U.S. interests in the Middle East and the nasty trick he has played on Russian President Vladimir Putin.

Trump calls Syria a "bloody sandbox." He's right about that. It is also a briar patch of warring tribes and sects, inexplicable ancient animosities and irreconcilable differences.

The president is not prepared to take responsibility for this complicated place, or to get caught up in it. If leaving creates an opportunity for Russia to fill the vacuum, as American lawmakers believe, then it is one Trump is happy to cede. The Russian leader struts on the world stage, but he has not exactly won a victory.