Definition: Given a document, generate a short title of the document. The title should convey the main idea/event/topic about which the document is being written. Note that URLs in the text have been replaced with [Link].
Input: Chris Christie  then the governor of New Jersey   reacts to a question during a 2013 news conference in Trenton  N.J. (Mel Evans/AP)
 Former New Jersey governor Chris Christie  has signed on to be an occasional contributor to ABC News  according to NJ.com.
 His  hiring will be announced Tuesday on âGood Morning Americaâ during the showâs 7 a.m. hour  reported NJ.com  which cited sources familiar with the plan but who wish to remain anonymous because they are not authorized to speak publicly. The networkâs decision comes two weeks after the Republican governor left office  on Jan. 16.
 Christie  was reportedly chosen because of  his  friendly relationship with President Trump and members of  his  administration. Christieâs ties to Trump could prove useful to the network as it prepares to cover midterm elections  beginning March 6 in Texas and ending Sept. 18 in Massachusetts. With thousands of Republican and Democratic candidates facing off in several levels of government across the country for spots on the November ballot   Christie  could provide a glimpse into what Trump voters are thinking.
 Christie  was once considered a potential for president  but  his  career has floundered since 2012. First came âBridgegate â in which  Christieâs  former allies shut down lanes of the George Washington Bridge for five days in 2013  apparently as an act of retaliation against a local mayor who did not support Christieâs reelection bid.  Christie  has denied  his  role in the scandal.
Then came  his  support for  his  former Republican presidential primary opponent  now-President Trump  despite Trumpâs attempts to embarrass  Christie .
By June 2017  nearing the end of  his  second term as governor   he  appeared to be most unpopular in  his  home state  The Washington Postâs Aaron Blake reported.  His  approval rating at the time was a bleak 15 percent  according to a Quinnipiac University poll.
[ Chris Christie  enjoyed a closed beach  then got flamed. But  he  definitely did not get a tan.]
After the âGood Morning Americaâ announcement airs Tuesday   Christie  is expected to return in the evening to discuss Trumpâs State of the Union speech  NJ.com reported.

Former New Jersey governor Chris Christie to join ABC News