What effect will lower tax credits on Tesla and GM plug-ins have in the new year? Take our Twitter poll

2018 Tesla Model S and 2018 Tesla Model XThe wind-down of federal tax credits on plug-in vehicles begins to hit in 2019. Tax credits for Tesla buyers were already reduced to $3,750 on Tuesday. The same reduction is scheduled to hit GM's plug-in models, the Chevy Volt and Bolt EV on April 1. The reduction in the credits is likely to have an effect on sales, especially as GM has already...