Tax perspective
Exxon Mobil pays more taxes on its income (over $27 billion in taxes) than the entire bottom 50 percent of America's population (about 63 million people).
The worldwide tax rate for Exxon Mobil on total sales (not net income) is over 40 percent. Don't know how much of this is U.S. tax.
I believe the graphic below includes all U.S. taxes paid, not just income taxes.