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1.Ulysses S. Grant and Franklin Roosevelt
5th Cousins 2x Removed
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4th Cousins 1x Removed
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2nd Cousins 4x 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
1st Cousins 2x Removed
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Brothers
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Father and Son
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Uncle and Nephew
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3.Richard Nixon and Jimmy Carter
4th Cousins
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3rd Cousins
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5th 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
4th Cousins
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5th 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
Granduncle and Grandnephew
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Father and Son
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Grandfather and Grandson
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1st Cousins 1x Removed
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William Henry Harrison's son, John Scott Harrison, is Benjamin Harrison's father.
6.Theodore Roosevelt and Franklin Roosevelt
3rd Cousins
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4th Cousins
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8th 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
Father and Son
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Uncle and Nephew
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2nd Cousins
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1st Cousins
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8.James Madison and James Polk
2nd Cousins 1x Removed
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1st Cousins
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1st Cousins 1x Removed
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2nd 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
4rd Cousins 3x Removed
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4th Cousins 4x Removed
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3rd Cousins 5x Removed
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2nd Cousins 6x Removed
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Adam's 2x great grandfather, John Alden is Coolidge's 7x great grandfather.
10.James Madison and Barack Obama
6th Cousins 4x Removed
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2nd Cousins 7x Removed
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8th Cousins 5x Removed
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3rd Cousins 9x 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.