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are you on the right post? there's nothing in op's post or my comment about politicians.
it's actually possible to do more than one thing at a time >

This is true.  They just usually don't touch some things until it's an election year, the other party is winning and they need a boost in poll numbers, or they are actively forced to.
Politicians job is to keep their house/senate seat.  And they will ABSOLUTELY delay, accelerate, ignore, or even outright manipulate things against their people's benefit for that seatwarming.