Congress, the Senate, whatever... They've been announcing their "bold 'new' vision" to go to Mars virtually every year or two since we landed on the moon. What has been done so far during the 45 years they've kept up this bullshit? Absolutely nothing! For decades they have been spending billions and billions of dollars on programs that are ALWAYS canceled. ALWAYS!
This is a complete waste of time and money. NASA is not simply completely useless at achieving any sort of bold vision, it is actively harmful. They deliberately sabotage efforts that are not subservient to their bureaucracy. Government subsidized launches directly compete with private launch systems that do not have the luxury of spending billions of dollars of taxpayer money, and thereby retard if not utterly stymie their development. That SpaceX has managed to succeed has nothing to do with NASA and everything in spite of them. (Without government launches, the private satellite industry would have had loads more money to contract with private launchers like SpaceX.)
If we get to Mars, it will be because of people like Elon Musk, doing it his way. If NASA has any part of it, it will be simply to go along for the ride, solely to grease the palms of the bureaucrats sufficiently that the government doesn't actively oppose Elon Musk's efforts.