Homeland Security Secretary Alejandro Mayorkas spoke out against what he referred to as “baseless” and “false” allegations brought against him by House Republicans as the House Homeland Security Committee prepares to vote on whether to send impeachment articles against him to the House floor.

In a lengthy letter to House Homeland Security Committee Chair Mark Green on Tuesday, he stated that the “false accusations” made against him by the panel do not “rattle” him and do not “divert” me “from the law enforcement and broader public service mission to which I have devoted most of my career and to which I remain devoted.”

“I have adhered scrupulously and fervently to the Oath of Office I have taken six times in my public service career,” he added.

Mayorkas, a Cuban-American went on to say that he had revered law enforcement since his parents brought him into America as a child to escape the Communist takeover of Cuba.

“It was because of everything America meant and gave to my family that I was motivated to enter public service,” he added, going on to recount his years of federal service, which includes service as a U.S. Attorney in Los Angeles, a U.S. Citizenship and Immigration Services Director and as Deputy Secretary of Homeland Security.

“I no longer introduce and argue evidence in a federal courtroom to persuade the jury to convict a dangerous criminal, but the mission to which I remain devoted is the same: to safeguard the American people,” he said further.

He went on to heap the responsibility of the border situation on Congress, saying that the only way to solve the worsening border crisis is for Congress to take action.

“We need a legislative solution and only Congress can provide it,” he wrote.

Mayorkas’ letter comes the day the panel was scheduled to meet to advance two articles of impeachment against him based on his failure to enforce immigration law at the southern border and has breached trust under his capacity as the Homeland Security secretary.

Meanwhile, the situation at the border continues to worsen. According to the US Customs and Border Protection, there were about 250,000 encounters of illegal immigrants on the U.S.-Mexico border in December, a figure that hits a new high.