We need to be one unified country-- the team with the most unselfish team players............................
He not only had to fix his father's faux pas......but more imminently, he has to get rogue nations to cease & desist.
If we become isolationist--& just resort to useless UN / NATO shuttle diplomacy w/o direct involvement-- somebody one day will destroy the planet.
How else are NKorea, Russia, Iran, Syria, Saudi Arabia, Lybia, Pakistan, India, China, & so own down to others in Africa / Asia going to be kept in check if they know military action's off the table & they can turn to France, Germany, et al to circumvent any toothless punitive embargo? Yes, i include countries like Russia, China, & Saudi Arabia too: they're only one different head of state removed from the others.
If WMD's didn't exist, if suicide bombers didn't exist-- we wouldn't be there. If Iraq was the only rogue nation, or two or three, we wouldn't be there.
No other nation is capable nor, worse yet, even willing-- to actively protect this planet. Every time some tragedy occurs, the cries go up why we don't do something, why we're not there yet. This planet has to be actively protected because any small nation or group can be capable of destroying it-- and Jimmy Carter-type diplomacy ain't gonna cut it.