You never see a senator take credit for a plant opening/expanding on their re-election blurb/townhall? You must be in an incredibly safe state.
> Why doesn't the logic apply to infrastructure projects which seem more marketable?
It applies to them, too. Again, if you're not seeing this, either your senator isn't doing much of it, you're not paying much attention to their campaign, or they are in such an incredibly safe district that their only challenger is Bozo the Clown.