My good friend Jason Hood interviewed Peter Leithart a couple of years ago on Christianity and politics. This paragraph is revolutionary.
Worship is the leading political activity of Christians. In worship, we
sing Psalms that call on God to judge the wicked and defend the
oppressed, and God hears our Psalms; we pray for rulers to rule in
righteousness; we hear the word of God that lays out our alternative way
of life, and we sit at the table where we who are many are formed into
one body, an alternative Christian polis, by sharing in the one loaf.
The problem is that in many churches those things don’t happen.
Churches don’t sing Psalms, and especially don’t sing the hard Psalms
that call on God to judge the wicked. More churches are having weekly
Eucharist, but in evangelicalism that is still more the exception than
the rule. The first political agenda for American Christians is to get
worship more into line with Scriptural requirements.