Rep. Alan Grayson, D-Fla., recently took an unusual approach to opposing the Keystone XL oil pipeline: arguing that it’s an earmark and thus not in line with current House rules. The fact-checking site PoliFact asked UMBC political science professor Roy T. Meyers to weigh in on the accuracy of that statement. Meyers told PolitiFact, “Earmarks have been criticized, often justifiably, for not being subject to sufficient scrutiny on their policy merits.” He continued, “Unlike most research grants that are subject to demanding peer reviews, or many contracts that must undergo extensive agency review and competitive bidding, earmarks are awarded only …