Though even a libertarian neo-isolationist like Senator Rand Paul favors carrying the fight to ISIS, he and some others voted no on the Syrian component of the president's plan. That appears to be the safest course for anyone who fears being tarred with support of an Obama initiative or what may prove to be another unpopular war in a future Republican presidential primary.
That made Thursday's vote an interesting test of character for those 2016 contenders who may have serious qualms about the president's strategy but know that advocating standing aside would be a dereliction of duty.
That's the quandary for Senator Marco Rubio, who stands second to none in the Senate as a critic of the president's foreign policy. Rubio has rightly denounced the president's failures in the Middle East and, in particular, his abandonment of Iraq and dithering on Syria that allowed ISIS to become a dominant force in both countries on Obama's watch.
Like other conservatives as well as a not insignificant number of liberal senators, he's also rightly worried that the president's plans for this conflict are woefully inadequate to the situation.
More than that, along with many Republicans, he believes the president is wrong not to seek an explicit authorization from Congress to fight ISIS rather than to merely pretend, as the administration wrongly contends, that the 2001 vote granting President Bush the right to use troops against al-Qaeda also applies to the rival, and now more powerful, group.
But Rubio indicated that he would vote yes for the authorization on Syria. The question now is whether this will haunt him or anyone else planning on running for higher office or reelection.
Cruz said he opposes arming the Syrian rebels because the administration doesn't really have a clue as to which groups opposing the regime of Bashar Assad are "good guys" and which are "bad."
It's difficult to argue too strenuously with those qualms. The president's adamant refusal to act on the growing catastrophe in Syria not only enabled ISIS to fill the void but also undermined the chances that genuine moderates might be able to replace the despotic Assad regime and its Iranian and Hezbollah allies.
Moreover, there are, as the New York Times noted, ominous precedents for senators who swallow hard and vote to authorize the use of force but later have that decision thrown in their face by primary opponents.
Hillary Clinton, who voted for the wars in Afghanistan and Iraq while in the Senate, found herself outflanked on the left by Barack Obama in 2008.
The question facing Rubio and the rest of the Senate is one that juxtaposes the certainty that voting for an expanded conflict will be viewed by many voters as a mistake against the certainty that the failure to act will allow ISIS to prevail in the fighting.
As I've noted, as the U.S. prepares to step up the fight against ISIS, the country's main problem is not the lack of a strategy but the seeming inability of the president to play the part of a wartime leader. Supporting operations in the Middle East under such circumstances is a perilous undertaking. So, too, is any effort to finally aid those Syrian forces that are not linked to Islamists or Assad and the Iranians.
But Rubio is right to worry more about the danger of inaction than any possible political repercussions. Were the U.S. to stand aside in Syria, especially with the president foolishly taking the threat of a direct intervention on the ground off the table, the consequences would be grave. If, as most Americans rightly now understand, ISIS is a serious threat to U.S. security, any counterattack undertaken now, whether well led or not, is bound to improve the situation. More to the point, the failure to act would be a potential catastrophe and might make all the difference in the ultimate outcome of a conflict in which U.S. success is not assured, notwithstanding the braggadocio being heard to that effect in Washington these days.
There is no way of knowing today whether votes on Syria or Iraq will be major liabilities in the winter or spring of 2016 or, indeed, if the ISIS threat will still be an issue at that time. The year and a half between now and the presidential primaries is a lifetime in politics. But Paul and Cruz are probably right in reckoning that any vote that can be construed as insufficiently anti-Obama is a safe bet and that those who vote yes are giving up a valuable hostage to fortune, whether or not they run for president.
Just as it is simple to second guess those who voted for war in Iraq without thinking what dangers would have resulted from doing nothing, it will be easy to take pot shots at those who vote yes today.
But Rubio is still in the right here. The costs of doing nothing in war are usually higher than those of boldness. Even with an inadequate leader who is not prepared to do everything to achieve victory, the situation will be better off if the U.S. finally starts to do something to alter the correlation of forces in Syria and Iraq against both Assad and the terrorists.
Voting no may eventually be popular, but it wasn't the right thing to do.