Was Thomas Jefferson a Christian?
Ask him.
Nope.
Richard Hildreth, the historian, in speaking of Jefferson's religious opinions, says:
"Jefferson's relations to the religious opinions of his country were somewhat peculiar. He believed, like Paine, in a personal God and a future life, but, like him, regarded Christianity, in the supernatural view of it, as a popular fable, an instrument for deluding, misgoverning and plundering mankind; and these opinions he entertained, as he did most others, with little regard to any qualifying considerations, and with an energy approaching to fanaticism. But he was no more inclined than were the New England Rationalists to become a martyr to the propagation of unpopular ideas. That he left to Paine and others of less discretion or more courage than himself." (History of the United States, vol. 5, p. 458 .)
"Jefferson seems to have considered himself excessively ill-treated by the clergy, who were constantly twitting him with his Infidel opinions." (Ibid, p. 461.)