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I am a big Joe Biden fan. The vice president is an indefatigable defender of U.S. interests abroad. So it pains me to say that on his recent trip to Israel, when Prime Minister Bibi Netanyahu’s government rubbed his nose in some new housing plans for contested East Jerusalem, the vice president missed a chance to send a powerful public signal: He should have snapped his notebook shut, gotten right back on Air Force Two, flown home and left the following scribbled note behind.