Government puzzle

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Across
  1. 5. redrawing of districts to benefit party in power in a state
  2. 6. granting Congress the power to pass all laws necessary and proper for carrying out the enumerated list of powers.
  3. 8. incumbent still in office after losing an election
  4. 11. freedom from prosecution for witness whose testimony ties them to illegal acts.
  5. 12. granting of a property right by a sovereign authority to an inventor.
Down
  1. 1. not directly stated but authorized by the constitution
  2. 2. if congress bans something today, you can't be punished for something you did yesterday
  3. 3. 45th president
  4. 4. difficulty passing laws that satisfy the needs of the people
  5. 7. A group of people officially delegated to perform a function
  6. 9. association of individuals or organizations, usually formally organized, that, on the basis of one or more shared concerns, attempts to influence public policy in its favour.
  7. 10. political procedure where one or more members of parliament or congress debate over a proposed piece of legislation to delay or entirely prevent a decision being made on the proposal.