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1.Ulysses S. Grant and Franklin Roosevelt
2nd Cousins 4x removed
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5th Cousins 2x Removed
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4th Cousins 1x Removed
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3rd Cousins
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Johnathan Delano is their common Ancestor, being Grant's 3x great grandfather and Roosevelt's 4x great grandfather
2.George H. W. Bush and George W. Bush
Brothers
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1st Cousins 2x Removed
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Father and Son
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Uncle and Nephew
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3.Richard Nixon and Jimmy Carter
5th Cousins
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3rd Cousins
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4th Cousins
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6th Cousins
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They share the same 5x great grandfather, Richard Morris.
4.James Madison and Zachary Taylor
2nd Cousins
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4th Cousins
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5th Cousins
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3rd Cousins
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These two share the same great grandfather, James Taylor, but they also share another ancestor. James Madison's 2x great grandfather, Francis Thomas, is Zachary Taylor's 3x great grandfather.
5.William Henry Harrison and Benjamin Harrison
Father and Son
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Grandfather and Grandson
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1st Cousins 1x Removed
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Granduncle and Grandnephew
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William Henry Harrison's son, John Scott Harrison, is Benjamin Harrison's father.
6.Theodore Roosevelt and Franklin Roosevelt
8th Cousins
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3rd Cousins
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4th Cousins
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5th Cousins
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Nicholas Roosevelt is the two's 4th great grandfather. Coincidentally, Franklin's wife is Theodore's niece!
7.John Adams and John Quincy Adams
1st Cousins
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2nd Cousins
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Father and Son
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Uncle and Nephew
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8.James Madison and James Polk
2nd Cousins
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1st Cousins 1x Removed
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2nd Cousins 1x Removed
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1st Cousins
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They share the same ancestor, James Taylor, who is Polk's 2x great grandfather, but, but Madison's great grandfather.
9.John Adams and Calvin Coolidge
2nd Cousins 6x Removed
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4th Cousins 4x Removed
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4rd Cousins 3x Removed
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3rd Cousins 5x Removed
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Adam's 2x great grandfather, John Alden is Coolidge's 7x great grandfather.
10.James Madison and Barack Obama
2nd Cousins 7x Removed
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3rd Cousins 9x Removed
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6th Cousins 4x Removed
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8th Cousins 5x Removed
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Edwin Conway is Madison's 2x great grandfather, and Obama's 11x great grandfather
I'm nominating this quiz because we need more American political quizzes on a site full of geography quizzes, even though I wouldn't have gotten the full 5 points on it had it been featured right now.