Do you consider the Republican House bill to be "an appropriate check?"
More information off the "cherry tree:" Two polls of Canadians, here and here.
To cut to the chase, yes, the Canadians delayed and altered their original program, and they did so because they believe there's a possible security risk.
"Hold off for a while until we get a handle on it" has been the major objection in the U.S. You saw the response from liberals here yourself.