Litmus test

The good old Litmus test of the non-political kind, pic: chervokas.typepad.com

Scientist among you know litmus tests as simple and easy tests to indicate the pH, i.e. a test lets let you test a liquid and decide whether it is acidic or basic/alkaline.  Blue litmus paper turns red under acidic conditions, blue under alkaline ones and purple if the solution is neutral (pH 7).

Where am I going with this, this is not a Science 101 blog.  Right, so lets turn to the figurative usage of the term litmus test in politics.  There a litmus test is a question asked of a candidate that shows his or her opinion on a certain – often controversial – topic.  Depending on the answer to such a Litmus test question the voters/those who approve the nomination of the  candidate might choose to support the candidate or to withhold that support.

Litmus tests are frequently used in American politics – be it expressedly stated or not.  Candidates for any type of higher office face them and especially judges.

Here are some examples: for many conservatives abortion is a litmus test, if a candidate for office is pro-choice he/she failed the litmus test and will not be supported by the majority.

Gun control is another such litmus test for conservatives.  If a candidate is for gun control chances are slim he’ll/she’ll be a conservative politician.

In summary, a (political) litmus test is a test in which a single factor (as an attitude, believe, opinion, etc.) is decisive

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