Sacagawea couldn't do it. What about George? Seeking to increase the popularity of dollar coins, the legislator behind the successful state quarters will propose a similar program on Tuesday featuring portraits of former U.S. presidents on the dollar coin. Rep. Mike Castle, R-Del., who originated the 50-state quarter program, along with Rep. Carolyn Maloney, D-N.Y., will propose starting the presidential dollars in 2006, featuring four presidents a year in the order in which they served. The coins could become popular collectors items, like the quarters, and might also encourage people to replace paper dollars with coins. Dollar coins would save...