spending. and, of course -- >> we will soon begin the construction of a great, great wall along our southern border. >> reporter: the president has said mexico will pay for it. mexico says no, but for now that's at least another $10 billion in the budget. but this may be the bold est claim about the plan. >> all of that without adding to the currently projected fy 2018 deficit. >> reporter: that's right, the administration says it can offset all those costs with savings and spending cuts. for example, up to 25% of the money for the environmental protection agency could go away. eliminating 3,000 jobs. the new administrator. >> we're going to roll back the regulations that have been an overreach of the past. that's going to be our focus in the near term and the budgeting process will play out. >> reporter: the irs, the department of education, and foreign aid are also on the chopping block. that aid is just a tiny fraction