I agree that Congress cannot overturn Obama's EO on immigration, yes. Think.
No what you agree with is there are NOT 15 Democrat Senators willing to overcome the EO when as I pointed out the following steps are followed:
Congress may attempt to overturn an executive order by passing legislation (a bill) that opposes the order.
However, the President can veto that bill, and Congress would then need to override that veto to pass the bill.
So can Congress override a veto?
Congress can override the veto via a two-thirds vote with both houses voting separately, after which the bill becomes law. The president may also veto specific provisions on money bills without affecting other provisions on the same bill.
So Obama will grant amnesty by executive order.
Congress will overturn the executive Order with a law counter the Executive Order.
Obama vetos the law i.e. doesn't sign the bill.
Congress then with 15 Democrat senators that agree it is wrong for millions of illegals to by pass the laws that law abiding people have followed
will override with 67 Senate votes Obama's EO.
You agree there won't be 15 Democrat senators willing to support the current laws regarding citizenship naturalization.