Article 1 section 8 clauses 1-18 July 8, 2019 16 32 64 128 Powers of congress article 1 section 8 clauses 1 18 Article i section 8 clauses 1 18 new and important powers Clause in article 1 section 8 Article 1 section 8 clause 16 meaning Article 13 clause 1 Article 1 section 8 clause 17