LARRY KUDLOW: Why won't Biden enforce sanctions against Iranian oil?

You know the old saw -- where there's smoke, there's fire? So, when people hear strange things coming out of the Biden White House, even if they're not completely corroborated, you just have to wonder: What is going on in there? 

The latest one over the weekend was that the administration was going to withhold ammunition from Israel. This, even though Congress just passed a supplemental foreign aid bill mandating war assistance to Israel. So, where is that rumor coming from? The White House won't say anything about it.