"As part of the mission to Europa, Culberson would also like to send a lander to the surface of the heaving, ice-encrusted world. This would allow scientists to better characterize the oceans below and, if the lander touches down near a fissure, possibly even sample the ocean. However, there has been some concern that having both an orbital spacecraft and a lander in a single mission would prove too challenging for a single rocket to deliver. So as part of the new House bill, the Europa mission is broken into two parts: an orbiter and, two years later, a lander."
Keith's note: This looks like it would be something like a dual "flagship" mission. Each spacecraft will be on the order of, oh $500 million each, and then, knowing Culberson's preferences, each would require its own SLS launch at $500 million to $1 billion each. Unless NASA's budget is going to get a big plus up on top of what it already needs to do other things that is going to eat into the whole #JourneyToMars thing - an effort that is already utterly underfunded.