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You must have no idea what a conservative is.
Cruz is a real conservative that believes in Godly government, and the rights that were supposedly protected by the Declaration of Independence, and the Bill of Rights.
He has fought for, and won the protection of those rights in the SCOTUS.
No other candidate has, nor do they even believe in them.
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Cruz is a brilliant lawyer and a professed Christian, both of which are admirable.
However, Cruz was obligated to argue the side he did at the SCOTUS. Had he been obligated to argue the other side he would have done and brilliantly also. He is a lawyer and so obligated in the positions he held at the time.