Pretty much this. This whole thread is moot as Obama is NO JFK; not even close. He's not a visionary and it's pretty apparent that he wants the US to take a step backward on the world stage. Remember, he's the 'lead from behind' guy.
Don't think the JFK different than Obama is a big part of this. I'm very familiar with JFK, and while I think he was one of our best presidents, and the best since, and a better leader, he could not have governed in this climate. He would have been destroyed. You think the Republicans are hyping Benghazi as an issue? What would they have done with the Bay of Pigs, when they'd have claimed that JFK blew our one chance to free Cuba by refusing to provide any US air assistance to the invading Cubans?
How would they have responded to his call for a massive project for a man on the moon when they shoot down almost any stimulus or package just to repair infrastructure?
You're missing the problem to think it's about the differences between JFK and Obama.
It's a large cultural shift of the Reagan 'government is the problem' sort, it's a loss of the sense of democracy, of the people to take charge of government, it's a shift from the lows of economic inequality - which had greatly decreased after the 1920's - back to record highs, and an unprecedented manipulation of public opinion by well funded propaganda think tanks and a right-wing media system of radio, tv and print and internet, and of big money allowed in politics and 'corporations are people', none of which existed then.
Those were the times of Democratic super-majorities in Congress so things could be done, whether Social Security, Medicare, Civil Rights, or men on the moon.
JFK was a great leader, but he couldn't have been today. He couldn't have been elected. The only democrats we can elect today are corporatist 'centrists'.
The country has lost its ability to do something big like that. The biggest thing we've done in a long time was to greatly expand our 'homeland security' spending.