The U.S. presidential primaries on Tuesday, April 26, 2016, held in the states of Connecticut, Delaware, Maryland, Pennsylvania and Rhode Island, were dubbed the “I-95 Primary.” Interstate 95 runs from Florida to New England.
 
The primary day has also been called the “Atlantic Primary” (after the Atlantic Ocean) and the “Acela Primary/Amtrak Primary” (after Amtrak’s Acela train).
 
”@rickklein Or for the 95% of us who can’t afford Acela, I-95 primary” was cited on Twitter on September 14, 2010. “I refuse to say tomorrow is Super Tuesday IV.  So, what can I call it? I-95 primary?” was tweeted by Chris Cillizza on April 25, 2016. “A Fix Facebook Live chat on I-95 primary day” by Chris Cillizza was published in the Washington (DC) Post on April 26, 2016.
 
   
Wikipedia: Interstate 95
Interstate 95 (I-95) is the main Interstate Highway on the East Coast of the United States, running largely parallel to the Atlantic Ocean and U.S. Highway 1, serving areas between Florida and New England inclusive. In general, I-95 serves metropolitan areas such as Boston, New York, Philadelphia, Baltimore, and Washington, D.C. in the Northeast and Mid-Atlantic, and Richmond, Fayetteville, Savannah, Jacksonville, and Miami in the Southeast. The route follows a more direct inland route between Washington, D.C. and Savannah, notably bypassing the coastal metropolitan areas of Norfolk-Virginia Beach and Charleston, which require connections through other Interstate Highways.
       
Twitter 
Ben Yelin
‏@byelin
@rickklein Or for the 95% of us who can’t afford Acela, I-95 primary. And for the 80% of us who can’t afford Turnpike tolls…SWA primary…
9:25 AM - 14 Sep 2010
 
Twitter
Rick Klein
‏@rickklein
.@mattklewis maybe the I-95 primary is better? more egalitarian, plus we can hit NH. Acela’s endpoint is Boston.
9:59 AM - 14 Sep 2010
 
Twitter
Republican News
‏@RepublicanWire
Post-Iowa GOP race turns to the ‘I-95 primary’ for the next month - Kansas City Star http://bit.ly/wuXBAJ
8:33 PM - 3 Jan 2012
 
Twitter
Chris Cillizza
‏@TheFix
I refuse to say tomorrow is Super Tuesday IV.  So, what can I call it? I-95 primary?
7:52 PM - 25 Apr 2016
 
Washington (DC) Post
A Fix Facebook Live chat on I-95 primary day
By Chris Cillizza April 26, 2016
I talked. And took questions. On the Internet. About politics.
 
Twitter
#NeverTrump
‏@ikeonic #NeverTrump Retweeted Mark Halperin
No effing clue how to say Acela. I’ll go w/ I-95 Primary.#NeverTrump added,
0:47
Mark Halperin @MarkHalperin
Another @MattNegrin special: 14 news anchors who can’t pronounce “Acela primary” on this big day
3:56 PM - 26 Apr 2016
 
Twitter
Kevin
‏@fakeKevinDJ
@TheFix @EmGusk >> Amtrak primary, Atlantic primary, now i95 primary? Lol. Love it
6:49 PM - 26 Apr 2016
   
Washington (DC) Post
Winners and losers from the I-95 primaries
By Chris Cillizza April 26 at 10:08 PM
Voters in five states stretching from the mid-Atlantic to the Northeast went to the polls on Tuesday.