Obama’s plan is not to wait for the years to pass to confer citizenship. Members of Congress have already stated a plan exists to have the illegals lie that they have been in the USA for the years required for immediate citizenship qualification.
The numbers planned for this illegal granting of citizenship is not in the thousands, it is in the millions. The reason behind these moves to citizenship is to confer eligibility to vote.
If true, this isn't an offense suitable for impeachment. It is out-and-out treason, grounds for summary dispatch.