In separate news, ESA's Bepi-Colombo mission is both over budget and over weight, requiring that that mission also undergo a slimming.
One of the contributors to Unmanned Spaceflight noted that a Congressional budget report expressed concern that the President's proposed budget (and most importantly its projected budgets for the coming years) doesn't seem to support funding the Jupiter Europa flagship mission:
"The Committee is concerned that the budget profile for the Outer Planets flagship mission to Europa appears inconsistent with a 2020 launch. Therefore, NASA is directed within 60 days of enactment of this Act to provide a projected full lifetime budget outline for the Europa mission, to include anticipated contributions from foreign partners, and an alternative budget profile that would accelerate the launch to 2018."
Editorial Thoughts: Planetary missions are getting more complex and more expensive now that so many of the easy missions have been completed. Cost overruns have always been a problem, but seem to me more likely as more difficult missions are tackled. This will make formulating a coherent roadmap all the more difficult.
The Congressional report seems to support my reading of the budget that there will not be enough funds to both support a large (~50% of NASA's planetary budget) Mars program, the Discovery and New Frontiers programs, and a large outer planets Flagship mission. The upcoming Decadal Survey process is going to be interesting, indeed.