MSNBC host Katy Tur and conservative commentator Erick Erickson on Thursday got in a heated exchange over President Trump Donald John TrumpBiden says voters should choose who nominates Supreme Court justice Trump, Biden will not shake hands at first debate due to COVID-19 Pelosi: Trump Supreme Court pick 'threatens' Affordable Care Act MORE's responsibility for the current political environment, just a day after a bevy of explosive devices and suspicious packages were sent to prominent Democratic figures.

“It’s pretty clear when you’re talking about this toxic political environment, that it did start with, mostly with, Donald Trump,” Tur said, noting many of Trump's statements during his 2016 presidential campaign. Among others, she pointed to the repeated "lock her up" chants that target former Democratic presidential candidate Hillary Clinton Hillary Diane Rodham ClintonThe Memo: Trump furor stokes fears of unrest Bloomberg rolls out M ad buy to boost Biden in Florida Hillicon Valley: Productivity, fatigue, cybersecurity emerge as top concerns amid pandemic | Facebook critics launch alternative oversight board | Google to temporarily bar election ads after polls close MORE.

Erickson attempted to chime in by referencing a past statement from former President Obama. But Tur quickly interrupted, asking Erickson to let her finish.

“Let me finish, this is my show," she said.

“Have you ever heard a politician other than Donald Trump say I’m so proud, or give a kudos to another politician who body-slammed a reporter? Have you heard that from anybody else other than Donald Trump?" she asked, referring to Trump's recent rally in Montana.

Erickson responded that "Trump is a symptom of what’s going on in this country," before adding that the president was not responsible for the incident in which a man shot at multiple U.S. lawmakers while they conducted a baseball practice in Washington, D.C., last year.

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"Both sides are to blame, and if you’re going to say it’s just Donald Trump, what you’re going to do is you’re going to have 50 percent of the country that says, you know what she’s not really interested in a solution," Erickson added.

Tur then concluded the segment by saying, “I think everybody needs to take responsibility for their own actions."

"But to say it didn’t get lowered, that the bar did not get demonstrably lower when Donald Trump started running for office, is just not true and it’s offensive,” Tur said.

The back-and-forth between Tur and Erickson came as reports continued to surface regarding the series of bombs and suspicious packages sent to Democratic officials, such as former Secretary of State Hillary Clinton, former President Obama and Rep. Maxine Waters Maxine Moore WatersPowell, Mnuchin stress limits of current emergency lending programs Pelosi: House will stay in session until agreement is reached on coronavirus relief Omar invokes father's death from coronavirus in reaction to Woodward book MORE (D-Calif.).

An explosive device was also sent to CNN's New York office.

None of the devices detonated before they were intercepted by authorities.

The events have sparked calls from GOP and Democratic lawmakers to tone down the increasingly intense political rhetoric.

"Time and time again, the President has condoned physical violence and divided Americans with his words and his actions," Senate Democratic Leader Charles Schumer (N.Y.) and House Democratic Leader Nancy Pelosi (Calif.) said in a statement.

On Wednesday, Trump called for unity in response to the incidents.

But he claimed just a day later that "a big part" of the anger in society is caused by "purposely false and inaccurate reporting" from the media.