15 Countries Containing an Unknown Letter

There are 15 countries below - all of which have one letter in common. Can you figure it out?
To make sure you know the answer, name a US President surname beginning with the unknown letter.
These are not neccessarily the only 15
Quiz by Quizzer6794
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Last updated: September 8, 2016
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First submittedSeptember 8, 2016
Times taken410
Average score50.0%
Rating3.29
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Country
South Korea
Slovakia
Uzbekistan
Turkmenistan
Ukraine
Country
Kosovo
Denmark
Kenya
United Kingdom
Burkina Faso
Country
North Korea
Pakistan
Sri Lanka
Kazakhstan
Tajikistan
US President
Kennedy
 
Secret Letter
K
+1
Level 76
Sep 8, 2016
Nice, good set up!
+1
Level 60
Sep 8, 2016
im guessing you didnt intend to put all the countries with the secret letter on the list
+2
Level 53
Sep 8, 2016
Kiribati? Kyrgyzstan?
+1
Level 65
Sep 8, 2016
Read the caveats: these are not the only 15 countries
+2
Level 52
Sep 11, 2016
I dont get the idea of the quiz if there is not every k-countries. I tried alphageitcally every letter and didn't get right, because I tried Kuwait with K.
+3
Level 68
Dec 29, 2020
Yes odd quiz, like saying guess the country that I'm thinking of that has a k.