Why is some medicine less effective on women? Over 75% of lab animals are male.

( CNN) The House and Senate are still at odds over a Russia sanctions bill that passed in the Senate last week, in a dispute that Senate Foreign Relations Chairman Bob Corker described Wednesday as “total silliness.”

The two chambers are quarreling over technological changes that the House Republicans tell need to be made in the bill, which passed the Senate 98 -2.

But Democrats are charging that the Trump administration is pushing the House to delay the measure because it’s opposed to further sanctions on Russia, as well as speech in the bill that would give Congress the ability to review any loosening of sanctions.