Sen. Bernie Sanders (I-VT) wants to see how many of his fellow senators believe in science.

Senate Majority Leader Mitch McConnell (R-Ky.) said Tuesday he will allow the Senate to vote on an amendment asking if they agree that climate change is impacting the planet.

At his weekly press briefing, McConnell said “nobody is blocking any amendments” to legislation that would approve construction of the Keystone XL pipeline.

The GOP leader had promised to allow an open amendment process on the Keystone bill.

But a measure proposed by Sen. Bernie Sanders (I-Vt.) had raised questions about whether he would stick to that commitment.

The Sanders measure asks whether lawmakers agree with the overwhelming consensus of scientists who say climate change is impacting the planet and is worsened by human-caused greenhouse gas emissions.

Democrats believe the measure could be a tough vote for some Republicans, particularly GOP senators running for reelection in 2016 in states carried by President Obama in 2012.

As Booman notes, this would be a good time to get the Senate on the record for other such controversial points of science, such as whether or not launching rockets into space might hurt the angels.

What I want to hear are the reasons some senators come up with for voting down this amendment.