Our Commentary ADN by Pat Forgey.   Alaska Gov. Bill Walker (NGP Photo) announced Tuesday that he had signed state operating and capital budgets, approving $9.8 billion in spending sought by the Legislature but vetoing a possible $200 million worth of controversial oil tax credits.      ... RELATED:  Dispute over oil tax credits plays out in shadow of Alaska's budget deadlock "It is apparent the current oil and gas production tax credit system is unsustainable," Walker said in a letter Monday to Senate President Kevin Meyer, (NGP Photo), telling him of [...]