**Exhibit          31(a)**

**ENERGY          FUTURE HOLDINGS CORP.**

**Certificate          Pursuant to Section 302**

**of          Sarbanes – Oxley Act of 2002**

| 1. | I                    have reviewed this quarterly report on Form 10-Q of Energy Future                    Holdings                    Corp.; |
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| 2. | Based                    on my knowledge, this report                    does not contain any untrue statement of a material fact or omit                    to state                    a material fact necessary to make the statements made, in light                    of the                    circumstances under which such statements were made, not misleading                    with                    respect to the period covered by this                    report; |
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| 3. | Based                    on my knowledge, the financial statements, and other financial                    information                    included in this report, fairly present in all material respects                    the                    financial condition, results of operations and cash flows of                    the                    registrant as of, and for, the periods presented in this                    report; |
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| 4. | The                    registrant’s other certifying officer(s) and I are responsible for                    establishing and maintaining disclosure controls and procedures                    (as                    defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal                    control over financial reporting (as defined in Exchange Act                    Rules                    13a-15(f) and 15d-15(f)) for                    the registrant and have: |
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|   | a. | Designed                    such disclosure controls and procedures, or caused such disclosure                    controls and procedures to be designed under our supervision,                    to ensure                    that material information relating to the registrant, including                    its                    consolidated subsidiaries, is made known to us by others within                    those                    entities, particularly during the period in which this report                    is being                    prepared; |
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|   | b. | Designed                    such internal control over financial reporting, or caused such                    internal                    control over financial reporting to be designed under our supervision,                    to                    provide reasonable assurance regarding the reliability of financial                    reporting and the preparation of financial statements for external                    purposes in accordance with generally accepted accounting                    principles; |
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|   | c. | Evaluated                    the effectiveness of the registrant’s disclosure controls and procedures                    and presented in this report our conclusions about the effectiveness                    of                    the disclosure controls and procedures, as of the end of the                    period                    covered by this report based on such evaluation;                    and |
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|   | d. | Disclosed                    in this report any change in the registrant’s internal control over                    financial reporting that occurred during the registrant’s most recent                    fiscal quarter (the registrant’s fourth fiscal quarter in the case of an                    annual report) that has materially affected, or is reasonably                    likely to                    materially affect, the registrant’s internal control over financial                    reporting; and |
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| 5. | The                    registrant’s other certifying officer(s) and I have disclosed, based on                    our most recent evaluation of internal control over financial                    reporting,                    to the registrant’s auditors and the audit committee of the registrant’s                    board of directors (or persons performing the equivalent                    functions): |
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|   | a. | All                    significant deficiencies and material weaknesses in the design                    or                    operation of internal control over financial reporting which                    are                    reasonably likely to adversely affect the registrant’s ability to record,                    process, summarize and report financial information;                    and |
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|   | b. | Any                    fraud, whether or not material, that involves management or other                    employees who have a significant role in the registrant’s internal control                    over financial reporting. |
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| Date:  November                    14, 2007 |       | /s/                      David A.                      Campbell     |   |
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|                                                  | Signature: | David                    A. Campbell                                |   |
|                                                  | Title:     | Interim                    Co-President and Chief Financial Officer |   |