I was floored by Senator John McCain decisive vote on the House floor against
repealing of Obama's American Health Care Act of 2017 ... "
Donald J. Trump
***
floor
verb
past tense: floored; past participle: floored; adjective: -floored
1.provide (a room or area) with a floor.
"a stone-floored building"
2. informal
knock (someone) to the ground, especially with a punch.
Similar:
knock down
knock over
bring down
fell
rugby-tackle