Senators John Thune (R-SD) and Chuck Grassley (R-IA) sent a letter to Energy Secretary Steven Chu August 14 questioning whether A123 Systems Inc. is still eligible to receive stimulus funds after China-based Wanxiang purchased $200 million of the company’s secured debt and provided up to $250 million in additional financing August 9. The deal results in Wanxiang owning 80 percent of A123. Of $249 million awarded to the Michigan-based lithium ion battery maker in 2009, about $120 million has yet to be disbursed.