This is of course true. But the bigger problem is that "the US Government" is not a monolith. It is composed of greedy selfish untrustworthy people who will do anything to get re-elected. The two major parties cannot even control their renegades like MTG or AOC, much less conspire with the other party to hide a big story for so lonlong
The counter argument is that the CIA or some other shadow agency actually runs the government and elections are a ruse to make the citizens believe they have a say what goes on.
Easy enough to assassinate an elected official when their security is actually run by the shadow agency.
The MTG or AOC would be beneficial, they may even be working with the shadow agency to act outlandish and divert attention away from more nefarious operations