The idea that either political party has "led" the US into wars is simply misleading in itself.
Nor does this video examine deaths in percentage to the population.

Wars are generally fought for geopolitical reasons that are in the interests of the ruling elite and industrial powers that benefit from conquest, friendly markets, and cheap resources. These power structures operate largely outside of the political process.

But the vid is a nice reminder that for the vast majority of it's history, the US has been at war. Constant war.

Another potential error here, is that war is typically (excluding the Barbary and Vietnam wars) declared by Congress. However, this shows which President was in office when war was declared.

Another potential error is that the political ideologies of the parties have shifted wildly over time, most notable the polar shift (pun intended) after the civil rights act of 64.