WASHINGTON — If you’re thinking about jumping the White House fence, stop right now. The National Park Service is expected to approve new steel spikes atop the security fence to discourage jumpers, according to internal documents obtained by NBC Washington. The federal agency also is considering raising the fence to 10 feet high or adding a second fence, placing one inside the current one. NBC Washington reports a permanent replacement fence should be completed by the end of 2016 and would likely include iron spikes. The U.S. Commission of Fine Arts will make the official decision. The National Capital Planning Commission is expected to approve the changes in a May 7 meeting.