Petting Zoo Disaster

I’m reading Becoming by Michelle Obama and in chapter 22 she describes a scene in where the president and the family are brought to there own personal petting zoo on the White House lawn. The zoo consist of 4 large cats(panther, cheetah, tiger, and lion). But when the unguarded family are petting the animals they suddenly start to lose sedation pouncing to feast on the family with the secret service across the yard. Obviously it ends up just being a bad dream she had but it got me thinking and I was wondering.
1.) How would the sudden shift of presidency and government all together effect America?
2.) What would general media and world reaction be to this event?
Can’t wait to see what you guys think!
 
If this was real, the minute the panther, cheetah, tiger, and lion start to act menacing towards the First Family, the Secret Service (there would probably be multiple agents) calls for backup and opens fire (and some of them get in the path of the animals; it's the duty of the Secret Service to protect the President First Family (1)) after telling the First Family to take cover with their handguns/automatic rifles/machine guns. I don't care how big those animals are, they won't be getting up after being turned into the wildlife version of swiss cheese (this is an example of There's No Kill Like Overkill)...

(1) An example of this is Secret Service agent Tim McCarthy putting himself between Ronald Reagan and John Hinckley, Jr. and taking a bullet for Reagan...
 
I imagine Obama's reputation would go down hard, if temporarily. PETA and other animal rights groups would decry this blatant act of animal exploitation, and you'd see everyone from late night talk show hosts republicans mocking it.
 
Who in their right minds would stock a petting zoo with the largets land-based carnivoures available?
Sheep, goats, bunnies, ponnies.. sure, but 250 kg of cat?
Even 4 lb of cat are not allways safe to pet.
 
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