I doubt it would be very effective given the velocities involved. Also, the nuke might be detonated above the Iron Dome's operating area (especially in the case of EMP).
If we de-MIRVd our nukes then we've put our heads on the nuclear chopping block.
Each Trident boat has 24 MIRVd D5 missiles.
And they are first strike accurate...true nuclear counter force.
And we have over 7,000 warheads in active service.
Good points. Thanks.