President Biden watched a preschooler’s infrastructure project crumble before his eyes Monday as he visited a New Jersey school to promote his own beleaguered spending plans. “I’m sorry, my fault. That was my fault. I made you look up,” Biden said, bending over to pick up the pieces of what had been a tower of building blocks. Biden appeared at the North Plainfield school with Democratic Gov. Phil Murphy, who faces an unexpectedly tight race for re-election next week against a surging Republican candidate, Jack Ciattarelli. Biden made only passing mention of Murphy but made time to gripe to the...