During a press conference that Republican presidential primary candidate Jeb Bush held after releasing a campaign video that was critical of GOP front runner Donald Trump, Bush translated his commentary into Spanish, which he speaks fluently. Trump took issue with that decision, however, saying that while he likes Jeb, "he should really set the example by speaking English while in the United States."

If you haven't already heard, the gloves are off. On Tuesday, Bush responded to weeks of attack ads and critical comments directed at him by opponent Donald Trump. In a video that calls attention to the many, many times that Trump has publicly identified himself as liberal-leaning over the course of his career, the Bush campaign has apparently gone on the offensive.

Between the press conferences, speeches, official campaign videos, Tweets, and Instagram posts, it can be easy to forget how this all got started. But the Bush-Trump rivalry has recently developed into something that could have a serious impact on the public perception of each candidate, respectively. Attacking Trump has proved to be a risky strategy, and the businessman seems confident that this latest ad is going to hurt the former Florida governor.

It was only a matter of time before the Republican underdogs rallied against Trump, who has been dominating the polls, and for Bush, that time came shortly after the GOP leader posted a series of short videos on his Instagram account, attacking Bush on his immigration policy and going so far as to show a clip of Barbara Bush, Jeb's mother, saying that she wouldn't like to see her son run for president.

Here's the first Instagram post, featuring Barbara Bush.

"I think it's a great country, there are a lot of great families," Barbara Bush said in an interview that was repurposed for the attack ad. "There are just other people out there that are very qualified, and we've had enough Bush's."

"Mother knows best Jeb!" Trump added at the end of the clip.

On Monday, Trump posted yet another short video—this one calling Bush out for a comment he made regarding the deportation of illegal immigrants.

The candidate described the process of crossing the border illegally as "an act of love," specifically for people seeking a better life for their families.

"Love?" Trump wrote. "Forget love. It's time to get tough."

The next day, he released another clip on Instagram.

Titled "Jeb Bush Honoring Hillary for Her Public Service," the video shows Bush speaking about Democratic presidential candidate Hillary Clinton, who was being awarded the 2013 Liberty Medal, followed by an interview with former president George W. Bush discussing the relationship between his family and the Clintons.

Evidently fed up with the constant stream of attacks, Bush fired back on Tuesday with this campaign video, offering a more comprehensive look at Trump's past comments.

Among the ostensibly liberal ideas that Trump has supported is his belief in women's right to choose to have an abortion, a single-payer healthcare system, and President Barack Obama's controversial stimulus package that many conservatives opposed.

Ironically enough, Bush also drew from Trump's previous comments that seem to suggest a closeness between the candidate and Clinton. "Hillary Clinton, I think, is a terrific woman," Trump said in an interview on Fox News. "I mean, I'm a little biased because I've known her for years."

"This is not a guy who is a conservative, and using his own words is not a mischaracterization," Bush told reporters following the video's release. "He attacks me every day. He attacks me every day with barbarities. They’re not true. What we did today was to put out in his words to show that he’s not conservative."

And finally, late on Tuesday evening, Trump came out in his own defense, saying that, "in New York City, everybody was a Democrat, practically." Then, finally, he took to Twitter.

Whether or not the campaign video will hurt or help Bush in the future is yet to be determined. But what is clear is that the rivalry between these leading GOP candidates is heating up, and this might very well be a defining moment of the 2016 presidential election season.