WASHINGTON | The Senate unanimously approved legislation Wednesday to ensure that tight credit markets do not impede students&#8217; ability to get college loans.</p><p>Like a bill that previously passed the House, the Senate legislation would increase limits on how much borrowers can receive in federally subsidized student loans.</p><p>That should decrease student reliance on more expensive private loans. The House and the Senate bills try to make it easier for parents to take out federal loans for their children&#8217;s education by allowing the parents to defer repayments until after their children leave school.</p><p>The bills also would give the Education Department the authority to buy up loans from student lenders to ensure they have access to capital and can keep issuing loans.</p><p>The Bush administration has called for such action.