Ted Cruz's national spokesman called Donald Trump's bid for the White House "the Seinfeld candidacy" Wednesday night, saying that the entire campaign "is about nothing."

Appearing on CNN Wednesday evening, Cruz adviser Rick Tyler criticized the billionaire businessman for his lack of substance in the 2016 race thus far, calling Trump out for saying "nothing about immigration, nothing about job creation, nothing about what's going on in North Korea right now, nothing about defeating ISIS," according to CNN. "I mean this is amazing." Tyler also said that "Trump's own worst enemy is himself."

The Cruz team has grown increasingly frustrated over the success of Trump's run, given, as they put it, that Cruz is running a campaign based on a conservative platform that Trump is unable to do because he isn't a true conservative.

While Cruz did win the Iowa caucuses, it was by a smaller margin over Trump than they had hoped --- just three percent. In Tuesday's New Hampshire primary, however, Trump won by a 20-point margin, but the second place finisher wasn't Cruz; it was Ohio Gov. John Kasich. Cruz came in third with 11.7 percent support.

Ahead of the next Republican primary in South Carolina on Feb. 20, Trump maintains a sizable lead over Cruz, according to recent polling averages compiled by RealClear Politics. In those polls, Trump leads the state with 36 percent support, while Cruz has 19.7 perecnt.

However, Cruz maintains that he can win the highly important contest in South Carolina and is, in fact, the only Republican candidate who can beat Trump.

"South Carolina historically has played a critical role picking presidents. And I think Iowa and New Hampshire perform an incredibly important function in narrowing the field and in many ways this field is becoming a two-person race between me and Donald Trump," Cruz said on the Mike Gallagher Show Wednesday, BuzzFeed reported. "What Iowa and New Hampshire demonstrate is that the only person in this field who can beat Donald Trump is me. The other candidates are not able to beat Donald Trump."