Many Republican leaders in the House and Senate are worried about the costs of rebuilding after Katrina, even though President Bush has promised, and rightly so, to devote all the funds needed to help the devastated region. Republicans who are worried about excessive deficit-financed spending are pushing for the costs will be offset (most are suggesting by cutting the budget elsewhere). To appease them, OMB Director Josh Bolten said Tuesday that the administration would consider offsets, but did not offer any details about what would be cut and by how much. As Stan Collender correctly points out (subscription required), any offsets proposed by the administration would to little, if anything, to reduce the amount Katrina relief spending will add to the deficit, and the national debt. Because President Bush refuses to even consider not extending or rolling back some of his first term tax cuts, it will be future generations who will be paying for reconstructing the Gulf Coast. The federal government is required by law to pay at least 75 percent of the cost of rebuilding public infrastructure after a disaster (1988 Stafford Act). To comply, Congress -- besides approving about $64 billion in emergency spending -- has agreed on a tax-relief bill to expand deductions this year for victims. The final bill was scored by the Joint Committee on Taxation as costing $6.1 billion over 10 years. Congress hopes these targeted tax cuts will spur employment of low-income workers on the Gulf Coast. In addition, President Bush signed three bills today to help in the aftermath of the disaster. The bills waive Pell Grant and other federal student loan requirements for displaced college students and expand Temporary Assistance to Needy Families eligibility for victims. CNN.com: House Passes Tax Breaks for Hurricane Katrina Victims