A new study shows members of Congress have collectively invested as much $196 million in military companies under contract with the Pentagon. The Center for Responsive Politics says the holdings could pose a conflict of interest for lawmakers deciding on spending for the Iraq war. More Republicans had military investments than Democrats, but Democrats have more money at stake. The highest stakeholder is Democratic Senator John Kerry. Kerry made at least $2.6 million from his investments between 2004 and 2006. He has up to $38 million invested in companies doing business with the Pentagon.