One can NOT uphold the U.S. Constitution and Sharia Law at the same time. Sharia law has absolutely no place in America and simply must not be supported in any manner. Please do NOT be fooled by those who support Shariah. Insofar as authoritative Shariah clearly entails the realization of a transnational Islamic theocratic state, its adherents are committed to, among other things, the overthrow of the U.S. Government, through violent means if necessary. Federal statutes -- see Smith Act - 18 U.S. Code & 2385 - define such activity as sedition and prohibit it. Islamic law or Shariah promotes Islam as the only legitimate theo-political system and to accomplish it dominance, through violent jihad if necessary worldwide (This is what is meant by the "Islamist" agenda). Shariah rules all aspects of life, but are most notorious for the mandate they provide for: stoning of adulterers, execution of homosexuals, amputations for petty crimes, beheading of Muslim apostates, institutionalized misogyny and myriad other violations of Western values and internationalized norms.
Authoritative Sunni and Shi'a legal schools of Islam consider Shariah the proper way. They use the Quran and the Hadith, or stories of Mohammed's life and behavior as justification. Shariah demands that its law be dominate over anything man devises. Moreover, according to Shariah, a Muslim is a martyr when they die killing/murdering the infidel (think any non-Muslim) in a battle (overt or covert) to spread sharia, as this is an act of obligatory "jihad."
The U.S. Constitution protects freedom and equality, while Sharia advocates violence and domination. We must understand that Islamism is a Threat Posing as a Religion.
I also reference a document entitled Shariah: The Threat to America: An Exercise in Competitive Analysis - Report of Team B II (pdf). This study is the product of an extended period of research, analysis and debate, undertaken by a large team of security policy experts, which seeks to re-orientate American national security policy regarding the Islamist danger.An Oklahoma City federal judge says she needs more time to decide if a voter-approved restriction against Islamic law should be kept out of the state constitution.
[....] At issue is an amendment to the Oklahoma Constitution that forbids state courts from using or considering international law or Islamic Sharia law in making decisions.
Oklahomans on Nov. 2 approved the amendment — in State Question 755 — with more than 70 percent of the vote. Legislators called the measure the “Save Our State” amendment. [....]"