The paladin class states that
at 2nd level, when you hit a creature with a melee weapon attack, you can expend one paladin spell slot to deal radiant damage to the target.
The Death Cleric Domain states that at 2nd level
when the cleric hits a creature with a melee attack, the cleric can use channel divinity to deal extra necrotic damage
Can a death cleric/ paladin multiclass expend spell slots to deal extra damage with smite and stack channel divinity to deal extra damage on the same attack?