A complete and utter shutdown of legislative business which would have made it impossible to move any of the Trump agenda forward at all.
After all, that's been the goal of the Democrats all along.
This leftist shooter simply thought he had found a more definitive way to delay and obstruct Trump. The Party of Violence strikes again.
Someone better find out if he had help, as in . . . conspiracy.
Sounds totally rational to me. Sinister, but rational.