The trio behind the measure, Sens. Chris Murphy (D-Conn.), Mike Lee (R-Utah) and Bernie Sanders (I-Vt.), have been longtime proponents of giving Congress a more proactive role in such matters. In recent years, they joined forces to invoke Congress’s war powers and bring an end to U.S. participation in Yemen’s civil war — an effort that secured majority support, but not enough to overcome then-President Donald Trump’s veto.

The new legislation on offer, however, goes much further — and as such, is likely to inspire heated debate..