Gabriella Demczuk for CNN US President Donald Trump addresses supporters during a rally in Dallas on Thursday, October 17. Inside Trump's rally in Dallas

Gabriella Demczuk for CNN US President Donald Trump addresses supporters during a rally in Dallas on Thursday, October 17.

Shortly after kicking off his campaign rally in Dallas on Thursday, US President Donald Trump targeted his Democratic opponents.

"I really don't believe anymore that they love our country," he said, prompting a chant of "four more years" from the crowd.

Trump was looking to galvanize voters in a state he carried by 9 percentage points in 2016.

The rally -- his third in a week -- comes as the embattled President faces an impeachment inquiry from House Democrats. He is also receiving criticism from some Republicans over his decision to withdraw US troops from Syria.

He told his supporters that what Democrats were really doing was targeting the Republican party, "and what they're really, really doing is they're coming after and fighting you," he said. "And we never lose."