Long-shot candidate Ben Carson announced on 2 March that he would not participate in the debate.
The debate will be held days ahead of several primaries and caucuses on 5 March.
Democrats will face off in 17 states, while Republicans will battle in 15 states in March.
Their victory speeches are a preview of the ammunition they plan to aim at each other in future months.
Trump widened his delegate lead among his rivals, getting him a step closer to winning the GOP nomination.
Take the 'piss poll' at Three Stags pub in Lambeth to vote Ted Cruz, Donald Trump or Marco Rubio.
Voters in 14 states will head to the polls or will caucus to choose their party's nominee for president.
There are 565 delegates up for grabs in the SEC Primary on 1 March.
The CNN-Telemundo debate kicks off in Ted Cruz's home state of Texas, just two days after the Nevada caucus.
Republican candidate bows to pressure over speaking at 2015 religious liberties conference with notorious pastor
Up until now Trump had not received any support from the Capitol and had indicated that it did not matter to him.
Voters in 14 states will head to the polls or caucuses to choose their presidential nominees on 1 March.
His credibility attacked, Cruz takes action to underscore his campaign's 'integrity standards'
The remaining five candidates will appear in the final debate before Super Tuesday.
Robertson campaigned for Cruz in South Carolina before the primary on 20 February.
Exit polls gave Trump 32.5% of the vote, placing him 10% ahead of nearest rival, Marco Rubio.
It's still early days but the upcoming South Carolina primary and Nevada caucus will provide a clue.
Republican voters head to the polls on 20 February while Democrats will have to wait until 27 February.
The news comes soon after the two countries signed an airline transportation agreement.
Two other polls released in the last two days, however, show Trump clearly in the lead.
Jeb has the misfortune to be standing when Middle America has run out of patience and is searching for a warrior.
Official calls proposal to rename area fronting Chinese embassy a 'political farce'