Senator Tom Harkin raised an important question yesterday when speaking to Ed Tibbetts of the Quad-City Times:

Harkin said he’s previously called for an immediate exit from Afghanistan, where U.S. troops are scheduled to leave in 2014.

“I think that timeline should be moved up,” he said in an interview. “I mean why are we in Afghanistan now? I thought we were in Afghanistan at the beginning to find Osama bin Laden. OK, that’s over with. Now, why are we in Afghanistan? Are we there to build a modern, 21st-century democracy?”

Senator Chuck Grassley told Tibbetts that he doesn’t seek any change in the U.S. approach to battling terrorists:

Grassley said bin Laden hasn’t been al-Qaida’s operational leader for years, just its inspirational head.

“The threat for terrorist activity is as great as ever,” he said. “It’s a setback for al-Qaida, without a doubt, but probably a temporary setback.”

I suspect Grassley is closer to the truth than White House chief counterterrorism adviser John Brennan, who on Monday compared the terrorist group to a “mortally wounded tiger”:

“We are hoping to bury the rest of al-Qaeda along with bin Laden,” Brennan told reporters.

“This is a strategic blow to al-Qaeda. It is a necessary, but not necessarily sufficient, blow to lead to its demise. But we are determined to destroy it.”

I don’t see how the massive U.S. military presence in Afghanistan (more than 100,000 troops) will further this goal when Al Qaeda operatives are working in many countries.

Escalating military operations in Afghanistan has cost the U.S. hundreds of billions of dollars as well as many lives. I still believe it will eventually be viewed as one of President Barack Obama’s biggest mistakes. Members of Congress should insist on answers to Harkin’s questions. If past experience is any guide, though, Obama will keep getting blank checks to fund war.