In this July 12, 2018 file photo, FBI Deputy Assistant Director Peter Strzok is seated to testify before the the House Committees on the Judiciary and Oversight and Government Reform during a hearing on Capitol Hill in Washington. (AP Photo/Evan Vucci)

Peter Strzok, a longtime FBI agent who was removed from the Russia investigation over anti-Trump text messages, has been fired by the agency, his lawyer said Monday.

The FBI had been reviewing Strzok’s employment after the politically charged text messages were discovered last year. President Donald Trump’s allies have seized on the texts, saying they show the investigation into possible coordination between the Trump campaign and Russia is tainted by political bias.

Strzok was fired late Friday by FBI Deputy Director David Bowdich, said his lawyer, Aitan Goelman. He said the 21-year veteran of the FBI was removed because of political pressure and “to punish Special Agent Strzok for political speech protected by the First Amendment.”

Strzok, who exchanged text messages with FBI lawyer Lisa Page, vigorously defended himself at a combative House hearing in July that spanned 10 hours. Strzok repeatedly insisted the texts, including ones in which he called Trump a “disaster,” did not reflect political bias and had not infected his work.

Texts between the two included their observations of the 2016 election and criticism of Trump. They used words like “idiot,” ″loathsome,” ″menace” and “disaster” to describe him. In one text four days before the election, Page told Strzok that the “American presidential election, and thus, the state of the world, actually hangs in the balance.”

In another text, Page wrote Strzok in August 2016: “(Trump’s) not ever going to become president, right? Right?!”

Strzok responded: “No. No he won’t. We’ll stop it.”

Strzok worked on the early stages of the Russia investigation in 2016 and worked on the special counsel’s team for a few months after Robert Mueller was appointed in May 2017.

Strzok was also a lead investigator on the probe into Democrat Hillary Clinton’s email sever in 2016. An internal Justice Department report issued in June blamed Strzok and Page for creating an appearance of impropriety through their texts but found the outcome of the Clinton investigation was not marred by bias. Clinton was cleared in the probe.

House Republicans cheered Strzok’s firing, with House Majority Leader Kevin McCarthy saying on Twitter that it was “long overdue.”