And Bush's proposal is less ambitious (25 years) and more practical (it's not just setting foot on Mars, there is an actual plan for a base).
The liberals now all tout Robert Kennedy as one of their heroes, but I was there.
Liberals mostly supported Gene McCarthy in 1968, and they would heckle the Bobby Kennedy rallies with accusations about wire tapping from when he was Attorney General and accusations about witch hunting McCarthyism from his days an a legal aide to Sen. Joe McCarthy fighting communists in government positions (as distinquished from the House UnAmerican Activities Committee in the House of Representatives which was fighting communist propaganda in Hollywood).
I think Bobby Kennedy would have a hard time adjusting to the Democrat Party of today.