Is there a correlation between elections and attacks?

Originally shared by VAL-U-PRO CONSULTING GROUP, LLC - SRIKANTH KIDAMBI

Is there a correlation between elections and attacks? Is it a recent trend, or had been misused historically to influence elections? Complete story soon. Here is an article for us to think in the mean time.
http://blogs.lse.ac.uk/europpblog/2015/05/19/terrorist-attacks-are-linked-to-the-timing-of-elections-but-only-in-states-where-it-is-difficult-to-influence-the-political-process/