I agree with Tom that you need to rephrase. However the suggested "strong leader" can have negative connotations in political science; it is often used in the discourse on Third World dictators.

I'm pretty sure this is the right term in political science.

The personalisation of political leadership is a phenomenon that has developed over recent decades.

http://books.google.co.uk/books?id=VS99RQ3JVLgC&pg=PT52&lpg=...

https://www.google.co.uk/search?tbm=bks&hl=en&q="personalisa...

http://www.lavoisier.fr/livre/notice.asp?ouvrage=1312434

http://books.google.co.uk/books?id=lcZCx-BuYRMC&lpg=PP11&ots...

If understood as “il ritorno della centralità del corpo del leader nella politica” or “la personalizzazione e spettacolarizzazione della politica” (http://tesi.eprints.luiss.it/10177/2/paradisi-sintesi-2013.p... then I’d consider going with something like this:

- personality-centric political culture
- personality-oriented politics
- the leader-centric trend(s) / practice(s) / pattern(s) in politics

http://universitypublishingonline.org/anthem/aaa/chapter.jsf...

http://books.google.de/books?id=5HtDAgAAQBAJ&pg=PA13&lpg=PA1...

http://www.thehindu.com/news/national/bjp-hits-back-at-rahul...


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Note added at 1 hr (2014-01-29 10:35:43 GMT)
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or maybe: "(the) persona-centric trends in political leadership patterns?"