Commentary President Joe Biden likes to associate himself with Barack Obama and in some ways models himself on the still popular ex-president. In many respects, Biden’s penchant for imitation might be a good thing. With this administration’s infrastructure effort, however, the imitation is unfortunate. Obama’s 2009 infrastructure effort failed horribly. The economy experienced the slowest recovery on record even as his infrastructure spending added considerably to the nation’s indebtedness. Now Biden has loaded his own infrastructure initiative with the same flaws that destroyed Obama’s effort. The current legislation may yet fail to get through Congress, but if it does, President Biden, if he genuinely wants to help the economy, should hope that whatever compromises become necessary will cleanse the bill of its Obama-like mistakes. Otherwise, Biden’s effort will fail as completely as Obama’s effort did. This issue turns on a well-established economic fact. The impact of government infrastructure spending has …