Donald Trump's lead in the 2016 Republican presidential primary election just got a lot tighter. According to the latest Quinnipiac University national survey released on Tuesday, Texas Sen. Ted Cruz is now trailing the GOP front-runner by only 4 percentage points.

The Quinnipiac survey, which is the second national poll published after the last Republican primary debate on Dec. 15, shows that Trump is in the lead with 28 percent of support, while Cruz is on his heels with 24 percent. That's 8 percentage points higher than what Cruz received in the last Quinnipiac poll.

Other national polls, however, show Trump with about 40 percent of Republican voters' support, reports CNN.

Meanwhile, Florida Sen. Marco Rubio came in third place with 12 percent of support, while Ben Carson dropped down 6 points from 10 percent compared to the last poll.

New Jersey Gov. Chris Christie, on the other hand, gained traction among Republican voters with 6 percent, while Jeb Bush polled at 4 percent. All other candidates earned 2 percent or less.

Despite his lead among GOP voters, the poll shows that Trump would lose by 7 points to Democratic front-runner Hillary Clinton in a hypothetical head-to-head match off. He would also lose to 2016 Democratic hopeful Bernie Sanders by 13 points. Cruz, however, ties with Clinton with 44 percent each in a match off.

The congressman also fairs better with voters who identify with the Tea Party faction of the Republican Party, 38 percent to 27 percent, and white Evangelical Christians, 33 percent to 22 percent. In addition, Cruz is apparently more popular than the billionaire businessman with very conservative supporters, 38 percent to 27 percent. Male GOP voters were almost split between the two candidates, with Cruz getting 29 percent and Trump winning 30 percent.

Trump came out on top in every other demographic.