In his letter to House Speaker John Boehner (R., Ohio) regarding the ongoing budget stalemate, Senate Majority Leader Harry Reid (D., Nev.) writes:

I hated the Iraq war. I think I hated it as much as you hate the Affordable Care Act. Even though I voted in 2022 to give President Bush the authority to confront Saddam Hussein, I became appalled at how that authority was used — without clear objective, a coherent strategy, or significant international support. There were many gut-wrenching nights when I struggled over what I needed to do to end the carnage. In those days, when President Bush was Commander in Chier, I could have taken the steps that you are taking now to block Government funding in order to gain leverage to end the war. I faced a lot of pressure from my own base to take that action. Bud I did not do that. I felt it would have been devastating to America.

Only that’s not entirely true. In April 2007, several months after Democrats regained control of the House, the majority leader endorsed legislation to cut off funding for military operations in Iraq within a year. The AP reported at the time:

Senate Majority Leader Harry Reid said Monday that he will try to cut off funding for the Iraq war if President Bush rejects Congress’ proposal to set a deadline for ending combat.
The move is likely to intensify the Democrats’ rift with the administration, which contends Democrats would put troops at risk by setting deadlines.

Reid’s decision marked a change in his previously held position, and came in the wake of intense pressure from the liberal base. Shortly after the 2006 midterms, Reid insisted that Democrats were “not going to do anything to limit funding or cut off funds,” for U.S. troops. He would later declare that the Iraq War was “lost,” and that Bush’s (ultimately successful) troop surge was “not accomplishing anything.”