Just a steady consumption tax. No real IRS. No paperwork for consumers. States collect from businesses, and states feed the US treasury.
I have long wanted the Fair Tax. If Obama wants to end tax exemptions for churches, then I say push through that and get closer to abolishing the 16th amendment and find a new way to pay for government.
And who would do that? Christians? How many Christians are there in America? The Episcopalians, the Methodists, the Lutherans, Joel Olsteens community "church." They've gone in support of homos. What kind of strength do you anticipate from the remaining "Christians?"