Democrats face a once-in-a-career decision on Iran

From Jennifer Rubin at the Washington Post via H/T Instapundit:

Undecided Democrats in the House and Senate will determine the outcome on the Iran deal. To the chagrin of the White House, they are nowhere near lining up enough votes to sustain a presidential veto. Sen. Robert Menendez (D-N.J.) will deliver a speech on Tuesday, one that critics of the deal expect will announce his disapproval and lay out the arguments against the deal.

What is going to sway fence-sitting Democratic lawmakers?

The intellectual argument in favor of the deal on the merits has in essence collapsed.
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To recap: War is not going to break out if Congress votes no. Wars are more likely to occur and likely to be more daunting if we help fuel Iran’s economy. If international sanctions end, the consequences can be minimized and the power of U.S. sanctions remains. A better deal, by this or the next president, is attainable. Now in the quiet of their offices, Democrats may simply be scared. The president will say mean things about them. They might draw a primary challenge. Pathetic as that may seem, it is a real consideration. Other then telling these lawmakers the Obama crowd is leaving office, opponents of the deal can point to plenty of polling data and condemnation of the deal by Jewish groups, esteemed former Democratic lawmakers and ex-officials. There will be plenty of “cover,” to put to it bluntly, if they vote no. And if they vote yes, will the administration come rushing to their defense with compelling arguments? This is the crowd that can’t and won’t satisfactorily answer lawmakers’ questions behind closed doors and the crowd that is reduced to smearing opponents. The opponents of the deal view this as a once-in-a-lifetime vote, while proponents don’t seem to view this as a litmus test. The energy is on the side of opponents. No Democrat should have faith a yes vote will be politically popular or defensible.

As Daniel Greenfield argues in the following post, Putting Obama Over Country Is Treason