From the AP:

Defense Secretary Robert Gates and the rest of the Bush administration may be undecided on whether to send more troops to Iraq, but several soldiers he met with at Camp Victory here on Thursday morning here said extra forces would help.

"Sir I think we need to just keep doing what we're doing," Spc. Jason T. Green, with the 101st Military Intelligence Brigade Combat Team of the 1st Infantry Division, told Gates during a breakfast session with about 15 U.S. soldiers.

"I really think we need more troops here. With more presence on the ground, more troops might hold them off long enough to where we can get the Iraqi Army trained up."

… Gen. George Casey, the top U.S. commander in Iraq and one of several generals who met with Gates, said he supports boosting troop levels only when there is a specific purpose for their deployment.
"I'm not necessarily opposed to the idea, but what I want to see happen is when, if we do bring more American troops here, they help us progress to our strategic objectives," Casey told reporters during a news conference with Gates and military leaders.

Gen. Jack Keane, former acting chief of staff and vice chief of staff of the U.S. Army, and military strategist Frederick Kagan explain their plan to reverse the tide in Iraq here and here.