http://www.gunstonhall.org/documents/objections.html>>>snip
George Mason's Objections to the Constitution
In September 1787, during the final days of the Constitutional Convention, George Mason wrote the reasons for his refusal to sign the Consitution on the back of a Committee of Style report. Manuscript copies of this document were circulated and Mason sent copies to various individuals, including George Washington. On November 22, the objections were printed in the Virginia Journal at the behest of Washington's secretary Tobias Lear in order that he could publicly refute them. The original manuscript is in the Chapin Library at Williams College.
>>>snip
The President of the United States has no Constitutional Council, a thing unknown in any safe and regular government. He will therefore be unsupported by proper information and advice, and will generally be directed by minions and favorites; or he will become a tool to the Senate--or a Council of State will grow out of the principal officers of the great departments; the worst and most dangerous of all ingredients for such a Council in a free country; From this fatal defect has arisen the improper power of the Senate in the appointment of public officers, and the alarming dependence and connection between that branch of the legislature and the supreme Executive.
Hence also spuring that unnecessary officer the Vice- President, who for want of other employment is made president of the Senate, thereby dangerously blending the executive and legislative powers, besides always giving to some one of the States an unnecessary and unjust pre-eminence over the others.
The President of the United States has the unrestrained power of granting pardons for treason, which may be sometimes exercised to screen from punishment those whom he had secretly instigated to commit the crime, and thereby prevent a discovery of his own guilt.