Republican presidential candidate Donald Trump delivers a foreign policy speech at the Mayflower Hotel April 27, 2016 in Washington, DC. Donald Trump pledged Wednesday to pursue an "American First" foreign policy if elected president, demanding that allies contribute more to global security. "America First will be the major and overriding theme of my administration," he said in a speech outlining his foreign policy. / AFP / Brendan Smialowski (Photo credit should read BRENDAN SMIALOWSKI/AFP/Getty Images)
Donald Trump implies Rafael Cruz knew JFK assassin
New Day
Speaking to Fox News, Donald Trump alleged that Rafael Cruz, the father of Sen. Ted Cruz, was involved with Lee Harvey Oswald, the man who assassinated President John F. Kennedy.
01:29 - Source: CNN
Donald Trump vs. Ted Cruz 34 videos
Republican presidential candidate Donald Trump delivers a foreign policy speech at the Mayflower Hotel April 27, 2016 in Washington, DC. Donald Trump pledged Wednesday to pursue an "American First" foreign policy if elected president, demanding that allies contribute more to global security. "America First will be the major and overriding theme of my administration," he said in a speech outlining his foreign policy. / AFP / Brendan Smialowski (Photo credit should read BRENDAN SMIALOWSKI/AFP/Getty Images)
Donald Trump implies Rafael Cruz knew JFK assassin
01:29
Now playing
- Source: CNN
kellyanne conway steve bannon hire sot newday_00005207.jpg
Conway won't say If Trump apologized to Cruz
01:40
Now playing
- Source: CNN
trump cruz split 1214
Ted Cruz: I will vote for Donald Trump
00:59
Now playing
- Source: CNN
Trump Cruz composite
What's behind Ted Cruz's endorsement of Trump?
05:05
Now playing
- Source: CNN
Donald Trump Press Conference July 22 2016
Donald Trump renews rivalry with Ted Cruz
02:52
Now playing
- Source: CNN
rnc convention ted cruz booed _00001420.jpg
Ted Cruz booed by Republican National Convention crowd
01:03
Now playing
- Source: CNN
Sen. Ted Cruz is expected to speak at the Texas delegation breakfast event at Marriot Key Center in Cleveland, OH at 8:45aET.
Cruz: I won't support those who attack my wife
01:51
Now playing
- Source: CNN
Trump Heidi Cruz Melania JFK response _00000203.jpg
Trump: Heidi the best thing Cruz has got going for him
04:28
Now playing
- Source: CNN
Trump Cruz JFK response_00013225.jpg
Trump doubles down on JFK assassination-Cruz dad link
01:33
Now playing
- Source: CNN
rnc convention chris christie ted cruz selfish dana bash sot_00000419.jpg
Christie: Ted Cruz's RNC speech was 'awful, selfish'
01:24
Now playing
- Source: CNN
rnc convention michael cohen ted cruz political suicide sot_00000903.jpg
Trump lawyer: Ted Cruz committed 'political suicide'
01:07
Now playing
- Source: CNN
Donald Trump Jr July 21 2016
Trump Jr.: We don't need Cruz's endorsement
03:34
Now playing
- Source: CNN
what it was like on the floor when the rnc turned on ted cruz origwx allee_00003308.jpg
The view from the floor when the RNC turned on Ted Cruz
01:20
Now playing
- Source: CNN
US Senator Ted Cruz of Texas speaks on the third day of the Republican National Convention in Cleveland, Ohio, on July 20, 2016.
Wednesday fireworks at the RNC in 90 seconds
01:30
Now playing
- Source: CNN
01 Ted Cruz Gray DC July 21 2016
Ted Cruz talks about his RNC speech
01:07
Now playing
- Source: CNN
Republican presidential candidate, businessman Donald Trump, second from left, gestures as Sen. Marco Rubio, R-Fla., Sen. Ted Cruz, R-Texas, and Ohio Gov. John Kasich watch him a Republican presidential primary debate at Fox Theatre, Thursday, March 3, 2016, in Detroit
Watch Ted Cruz pledge to support GOP nominee at debate
01:14
Now playing
- Source: Fox News
Focus Group Ted Cruz RNC Speech July 21 2016
Undecided voters confused by Ted Cruz speech
02:10
Now playing
- Source: CNN
Ted Cruz Donald Trump plane arrival_00000320.jpg
Trump's plane interrupts Ted Cruz
00:55
Now playing
- Source: CNN
HAMMONTON, NJ - MARCH 29: New Jersey Governor Chris Christie speaks at a Reform Agenda Town Hall meeting at the New Jersey Manufacturers Company facility March 29, 2011 in Hammonton, New Jersey. A State Supreme Court appointed judge ruled on March 22, 2011 that his eight percent education budget cuts last year had violated New Jersey law because the state was unable to fulfil it's educational obligations. (Photo by Jessica Kourkounis/Getty Images)
Christie to Cruz: Keep your word, endorse Trump
05:04
Now playing
- Source: CNN
ted cruz heckler donald trump supporter exchange bts_00002812.jpg
Ted Cruz: Donald Trump is a 'pathological liar'
04:28
Now playing
- Source: CNN
trump cruz split 1214
Ted Cruz's entire Donald Trump rant
11:50
Now playing
- Source: CNN
ted cruz heckler donald trump supporter exchange bts_00002812.jpg
Cruz and Trump supporters get in heated exchange
01:34
Now playing
- Source: CNN
Republican presidential candidate Donald Trump speaks to guests and supporters during a rally at the Indiana State Fairgrounds on April 20, 2016 in Indianapolis, Indiana.
Trump, Cruz spar over transgender bathrooms
04:18
Now playing
- Source: CNN
Republican presidential candidate Donald Trump speaks during the 2016 annual New York State Republican Gala on April 14, 2016 in New York City. Donald Trump, Senator Ted Cruz of Texas and Gov. John R. Kasich of Ohio take part in a fund-raiser for the state Republican Party, being the first time they are seen together since they decided to abandon the so-called loyalty pledge they signed last year to support whoever becomes the party nominee. (Photo by Eduardo Munoz Alvarez/Getty Images)
Ted Cruz: Trump's campaign can't run a lemonade stand
00:51
Now playing
- Source: CNN
Ted Cruz supporters are gathering in Milwaukee, WI to watch tonight's results come in. Cruz is expected to address the crowd sometime after 9pET. We will update when a better ETA is available.
Trump aide: Ted Cruz using 'Gestapo tactics'
01:06
Now playing
- Source: CNN
Ted Cruz supporters are gathering in Milwaukee, WI to watch tonight's results come in. Cruz is expected to address the crowd sometime after 9pET. We will update when a better ETA is available.
Cruz plans to block Trump at convention
03:53
Now playing
- Source: CNN
Donald Trump Ted Cruz composite
Trump camp looking for a reboot before New York primary
04:33
Now playing
- Source: CNN
trump cruz split 1214
Cruz, Trump make mad dash for delegates
03:57
Now playing
- Source: CNN
ted cruz campaign new york values roth dnt ac_00002106.jpg
New Yorkers on Ted Cruz and 'New York values'
02:24
Now playing
- Source: CNN
Republican presidential candidate Donald Trump speaks to guests during a campaign stop at Memorial High School on April 2, 2016 in Eau Claire, Wisconsin. Wisconsin voters go to the polls for the state's primary on April 5.
Trump, Cruz look ahead to New York
03:57
Now playing
- Source: CNN
five candidates wi primary 0405
Wisconsin primary could be tipping point in GOP race
02:35
Now playing
- Source: CNN
Donald Trump Ted Cruz John Kasich composite
Donald Trump: John Kasich hurting me more than Ted Cruz
02:27
Now playing
- Source: CNN
Donald Trump (L), chairman and president of The Trump Organization, speaks during a discussion at the Economic Club of Washington, December 15, 2014 in Washington, DC.
Donald Trump: Heidi Cruz retweet was a mistake
01:24
Now playing
- Source: CNN
wisconsin gop town hall donald trump ted cruz wife photo 06_00010607.jpg
Donald Trump on Heidi Cruz photo: 'I didn't start it'
01:20
Now playing
- Source: CNN