It is likely paper and cardboard thst has not gone through processes to remove smelly components. Likely some phenols or as the other commenter mentioned, butyrate. Cheap recycled paper and cardboard often has these smells, especially if it gets wet.
While appointing buffoons and neocons is compatible with saying, “look at the blatant incompetence and cruelty, this will degrade the state faster”, I think there is something to be said for the accelerationism of the Biden administration’s approach of career ghouls that know how to pull the levers of power and keep their constituencies docile.
While Dems and the GOP should be understood as two factions in the same team, I think the most accelerationist policies are to stay the course on neoliberalism and to foment a split between the imperialist bloc and one led by China etc. Trump offers incoherence on the former while Biden offers pure commitment to neoliberalism. Trump offers ham-fisted attempts for the latter, which strengthens any anti-US bloc and makes them more comfortable earlier while Biden seeks to implement the plans of State Department ghouls, trying to build the split along a material basis, e.g. using Ukraine to peel off Europe, hightening actual mechanisms for war and direct confrontation.