It’s been exactly three weeks since Election Day, but the Obama administration still hasn’t said how it will respond to ballot measures legalizing pot in Colorado and Washington.

Since the drug remains illegal under federal law, the administration could squash the states’ nascent legalization movement by asking for courts to stop the implementation of the new laws, or by sending more federal agents to the states. But even though they knew the measures would be on the ballot for more than a year, “the Obama administration has stayed mum On The Other Big Thing That Happened on Nov. 6,” as Reason’s Mike Riggs wrote yesterday.

Meanwhile, stakes have been raised: Prosecutors in both stateshave dropped pot charges against hundreds of offenders, and legislators in Maine and Rhode Island are considering their own legalization bills.

What the administration will do remains entirely unclear, but it’s clear what they should do: nothing. Give the states a wide berth and see what happens. Not only is this good policy, but it turns out be good politics, as we’ll see in a minute.

But first, what might Obama do? No one knows – perhaps not even those making the decisions — and there’s evidence pointing in all directions.

On one hand, the past four years do not bode well for Colorado and Washington. Obama has been, almost without a doubt, the worst president in history on marijuana reform, presiding overunprecedented crackdowns on medical marijuana dispensaries in California despite promising during the 2008 campaign to respect state laws. While it’s unclear if this effort came from the White House, it could certainly have stopped it.