
Why Gas Prices Vary So Much by State
Cross a state line and the pump price can jump, even though the fuel is largely the same. Taxes, rules, and geography explain most of the gap.

Cross a state line and the pump price can jump, even though the fuel is largely the same. Taxes, rules, and geography explain most of the gap.

The national debt is the running total of what the federal government owes its lenders. It is held by the government itself, private investors, and foreign countries.

The rules a department writes reach farther than any law Congress passes this year.

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The field's most practical textbook came from a political scientist who insisted that the best of the feasible is the best you get.

The field's hiring gap is wide enough that certifications, home labs and entry-level IT work can outrank a diploma.

Civic duties are what the law asks of you; constitutional guarantees are what the law owes you — and the two are not the same thing.