Senate Republicans are seeking to erect potential new obstacles to financial rule-writing at agencies like the Securities and Exchange Commission and Federal Deposit Insurance Corp., the New York Times DealBook blog reported on Friday. The nonbinding amendments tucked into the Senate budget plan call on agencies to evaluate more carefully the economic effects of new regulation, cutting off potential shortcuts to so-called cost-benefit studies. Lawmakers are unlikely to reconcile the Senate budget with the House's plan, making the measures more symbolic than anything else. And it is unclear whether lawmakers will approve the Republican amendments to the Senate’s blueprint, the chamber's first budget since 2009.