The Conservative chairman's visit to the Vatican on Tuesday is the latest example of how her party is increasingly willing to talk about religion.
It could misfire. Christianity sits uncomfortably with the policies of both political parties. What are the Conservatives to make of the laws on land tenure and usury set out in Chapter 25 of Leviticus?
There is worse: the encyclical Vix Pervenit of 1745 re-states the scriptural ban on usury, to say nothing of the entire body of Catholic Social Teaching encyclicals given out since 1891. These commence with Rerum Novarum, the encyclical signed by Pope Leo XIII, and continue to the latest, Benedict XVI's Caritas in Veritate of 2009 - which argues that justice is the foundation of charity.
The encyclicals from Quadragesimo Anno (1931) onwards argue the case for social responsibility in the economic sphere, setting the Popes up as advocates of principles well to the left of anything the British Labour Party would have dared to promote over the past couple of decades.
The politicians may get this thrown back in their face.
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