Democrats have learned they cannot appease terrorist Republicans If you think that old dogs can’t learn new tricks you need to take a look at Joe Biden. Back in 2011, during the first serious Republican debt ceiling hostage crisis and the protracted negotiations that followed, Biden undercut Senate Majority leader Harry Reid and wrecked a deal he had made for a terrible one. There was a lot of hand-wringing at the time over Biden’s tendency to give away the store so when the Republicans pulled their hostage maneuver again in 2013, Reid stipulated that Biden needed to stay out of the negotiations — and the White House agreed. The Obama administration, including Biden, had learned their lesson: Negotiating with the extremist GOP on the debt ceiling is a very bad idea. They refused and the Republicans capitulated, sparing the country and the world economy another jolt. The days of dreaming about a “Grand Bargain” were blessedly over. You may have noticed that we never had one of these fights during the Trump years when the deficit was growing at a very fast pace. Obama regularly offers three telltale notions that will define his presidency — if events allow him to define it himself: “sacrifice,” “grand bargain” and “sustainability.” To listen to Obama and his budget director Peter Orszag is to hear a tale of long-term fiscal woe. The government may have to spend and cut taxes in a big way now, but in the long run, the federal budget is unsustainable. That’s…