#### Paul Howard TILLEY, Plaintiff-Appellant, v. Michael J. ASTRUE, Commissioner, Social Security Administration, Defendant-Appellee.

No. 12-7021.

United States Court of Appeals, Tenth Circuit.

Nov. 20, 2012.

Paul Howard Tilley, Okemah, OK, pro se.

Roberta Gene Bowie, Social Security Administration, Office of the General Counsel, Dallas, TX, Cheryl R. Triplett, Office of the United States Attorney, Muskogee, OK, for Defendant-Appellee.

Before LUCERO, TYMKOVICH, and HOLMES, Circuit Judges.

ORDER AND JUDGMENT*

CARLOS F. LUCERO, Circuit Judge.

Paul Howard Tilley, proceeding pro se, appeals from the district court’s order upholding the Commissioner’s decision that his supplemental security income (“SSI”) should be reduced by the amount of his disability insurance benefits (“DIB”). Exercising jurisdiction under 28 U.S.C. § 1291 and 42 U.S.C. § 405(g), we affirm.

“We review the district court’s decision de novo and independently determine whether the ALJ’s decision is free from legal error and supported by substantial evidence.” *Fischer-Ross v. Barnhart,*431 F.3d 729, 731 (10th Cir.2005).

In 2007, Tilley was awarded both SSI and DIB by an administrative law judge (“ALJ”). However, 42 U.S.C. § 1382a(b) requires that SSI be reduced by certain types of other income that are not specifically excluded. *See also*20 C.F.R. § 416.413. DIB funds are considered income that must be offset from SSI benefits. 42 U.S.C. § 1382a(a)(2)(B); *see also*20 C.F.R. §§ 416.1121, 416.1124. Accordingly, the agency reduced Tilley’s SSI benefits by the amount of his DIB funds. Tilley objected and asked for a formal hearing before an ALJ.

Prior to the hearing, Tilley submitted a list of witnesses that he wanted to call. He included the president, several members of Congress, and various national and local television reporters and anchors. Declining to subpoena any of the witnesses, the ALJ explained that “looking at the nature of the appeal there was no reason to [issue the subpoena].... I don’t see ... a mistake.” The ALJ denied the appeal and the Appeals Council denied review.

Tilley filed a complaint in district court. The magistrate judge to whom the matter was referred issued a report and recommendation to affirm the ALJ’s decision. Over Tilley’s objections, the district court adopted the magistrate judge’s report and recommendation. This appeal followed.

There is no question that the ALJ correctly applied the law in upholding the Commissioner’s decision that Tilley’s SSI should be reduced by his DIB. Further, Tilley has failed to explain how the ALJ’s refusal to subpoena his witnesses violated his due process rights. Finally, because *765our review is limited to whether the ALJ’s decision is supported by substantial evidence and whether he correctly applied the law, we lack the authority to investigate Tilley’s claims of illegal surveillance or to interview witnesses.

For the foregoing reasons, the judgment of the district court is AFFIRMED.

*

 After examining the briefs and appellate record, this panel has determined unanimously that oral argument would not materially assist the determination of this appeal. *See*Fed. R.App. P. 34(a)(2); 10th Cir. R. 34.1(G). The case is therefore ordered submitted without oral argument. This order and judgment is not binding precedent, except under the doctrines of law of the case, res judicata, and collateral estoppel. It may be cited, however, for its persuasive value consistent with Fed. R.App. P. 32.1 and 10th Cir. R. 32.1.