10.  National Debt – Massive deficit spending sucks up domestic capital and invites foreign manipulation of our economy.
9.  Energy –  No energy means no farming, healthcare, housing, transportation, manufacturing, refrigeration, or the Super Bowl; holding ourselves hostage to foreign lunacy is a recipe for suicide.
7.  Russia – New surge of nationalism and centralization of power, and its role as the Saudi Arabia of natural gas, is fueling a new Russian desire to reclaim lost glory
6.  China – It has all the ambition of the Soviet Empire, the economy to support it, and ownership of an exploding percentage of the U.S. economy and our debt which they could use render us impotent.
5.  Islamic terrorism – Hardly a religion of peace, they don’t want to coexist with us—the want us dead; they would subjugate our Constitution to Islamic law.
4.  Illegal Immigration – Twelve to twenty million and counting.  They’re not taking jobs Americans won’t do; they’re taking jobs Americans would do if we didn’t pay them not to work.  Illegal immigrant labor is fool’s gold.
3.  The North American Union – In spite of assurances by proponents, the effective elimination of borders, merging of economies, and uninhibited flow of people from Mexico and Canada will harm the US economy and national security.
2.  Voter ignorance and apathy – 75 years of not watching Congress carefully has led to more loss of freedoms than all the wars we’ve ever fought.

And the #1 threat to our Liberty
 

1.  Our politicians – Our representatives are interested in only one goal:  Re-election.  They ensure this with unceasing meddling in all aspects of society in an effort to pander to voting blocs and solicit campaign funds.  The best interests of society in lost freedom is completely irrelevant to their own self-interested quest for power.