BOULDER, CO - OCTOBER 28:  Presidential candidate Donald Trump (C) smiles while Sen. Marco Rubio (L)   and Ben Carson look on during the CNBC Republican Presidential Debate at University of Colorados Coors Events Center October 28, 2015 in Boulder, Colorado.  Fourteen Republican presidential candidates are participating in the third set of Republican presidential debates.  (Photo by Justin Sullivan/Getty Images)
Donald Trump vs. Marco Rubio vs. Ben Carson in N.H.
02:29 - Source: CNN

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Donald Trump used his Twitter account to slam GOP primary opponent Marco Rubio

His attacks focused on Rubio's record on immigration as well as saying he "chokes" under pressure

Trump will face off against Rubio and six other GOP challengers at a debate Tuesday

CNN  — 

Donald Trump focused his trademark social media fury on Marco Rubio on Monday night, launching a volley of critical tweets at the Florida senator on his immigration record as well as a few insults, saying he “chokes” under pressure.

The focus on Rubio offers a potential preview of Trump’s strategy for the fourth Republican presidential debate Tuesday night.

“Marco Rubio is a total lightweight who I wouldn’t hire to run one of my smaller companies – a highly overrated politician!” Trump tweeted.

Trump followed that tweet with criticism of how Rubio delivered the Republican response to Obama’s State of the Union address in 2013.

“Marco Rubio couldn’t even respond properly to President Obama’s State of the Union Speech without pouring sweat & chugging water. He choked!”

He combined both messages in his final tweet of the evening on the subject: “Marco Rubio is totally weak on illegal immigration & in favor of easy amnesty. A lightweight choker – bad for #USA!”

The twitter attack matched Trump’s language earlier in the day at a packed campaign rally in Illinois.

At the event, the business mogul said of Rubio, “I look at a guy like Rubio, who’s very, very weak on illegal immigration. He was a member of the Gang of eight – that meant ‘come in.’”

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While the billionaire businessman has managed to stay in first or second place in most recent polls – behind only neurosurgeon Ben Carson – Rubio has risen in recent days to third place in many surveys, buoyed in part by a positive performance at the last debate last month.

Trump also appeared on ABC’s “Good Morning America” on Tuesday and offered only a coy preview of the night’s debate.

Asked by host George Stephanopoulos whether he would “tee off” on Carson, Trump demurred, saying “No not at all, we’ll see what happens. It will be loose, it will be very flexible. I have no idea what’s going to happen, but it will be interesting.”