If you want that block quote to format correctly, don’t indent the >. That way it will turn out like this, instead of a single line that can’t fit on the screen without scrolling (some mobile clients like Sync, probably show it alright, but the web client certainly doesn’t.):

No person shall be a Senator or Representative in Congress, or elector of President and Vice President, or hold any office, civil or military, under the United States, or under any State, who, having previously taken an oath, as a member of Congress, or as an officer of the United States, or as a member of any State legislature, or as an executive or judicial officer of any State, to support the Constitution of the United States, shall have engaged in insurrection or rebellion against the same, or given aid or comfort to the enemies thereof. But Congress may by a vote of two-thirds of each House, remove such disability.