The choice of Tim Kaine to be Hillary Clinton's vice-president joins two active proponents of two of mainstream Christendom's most active social uplift doctrines.
The Methodist Church has always been active against social evils, from the days of John and Charles Wesley's opposition to slavery. A core principle of the current United Methodist Social Creed is
We believe in the right and duty of persons to work for the glory of God and the good of themselves and others and in the protection of their welfare in so doing; in the rights to property as a trust from God, collective bargaining, and responsible consumption; and in the elimination of economic and social distress.
Catholic Social Teaching is an even more developed theory and practice of the just order of society, organized around a "preferential option for the poor."
Using the power of government to lift up "the least of these" is what Methodist and Catholic politicians have been doing for all of American history.