This is not a surprise. Highways and Roads are paid for through gas taxes. Because Barack has openly stated he wants to build more infrastructure, improve roads, etc... it is only inevitable that the gas tax will be levied if he is voted into office.
My Take
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I don't support a tax increase, but I do think we need to work on a unified grid for electricity throughout the US. At the same time, we can add other infrastructure related features on the land that will be bought up or seized through eminent domain in order to "kill 2 birds with one stone".
My idea consists of laying fiber optic cables, fuel pipelines, water pipelines, and wireless cell towers on the transmission lines.
This way there will be no water shortages in any given region of the US, states can be profitable by exporting their natural resources more efficiently, and infrastructure can be mire efficiently utilized.