Name: Sen. Merkley: Trump 'has the maturity of a five-year-old'
Uploaded: Fri Dec 23 2016 01:00:49 GMT+0000 (UTC)
Duration: 9 min 38 s
Description: Sen. Jeff Merkley slams the president-elect's tweet about expanding our nuclear arsenal, praising President Obama's efforts to ‘Trump-proof’ the government.

Dec. 23, 201609:38