President Donald Trump jokingly said in a speech that if he were to be impeached, it would be because his supporters "didn't go out to vote."

"It's so ridiculous," Trump said as the audience laughed. "But we'll worry about that if it ever happens. But if it does happen, it's your fault."

Democratic lawmakers have largely avoided publicly talking about impeachment, a topic expected to energize Republican voters.

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President Donald Trump jokingly said in a speech Thursday that if he were ever to be impeached, it would be because his supporters "didn't go out to vote."

Trump began his Thursday-night campaign rally in Billings, Montana, by embellishing some of his economic achievements.

"You look at the numbers at every category, it's great," Trump said. "We're doing a great job."

But at one point Trump took a turn, warning that if Democrats regained control in Congress and moved on impeachment proceedings, the blame would rest with his supporters.

"But we'll worry about that if it ever happens," Trump said. "But if it does happen, it's your fault, because you didn't go out to vote."

"You didn't go out to vote — that's the only way it could happen."

As many Republicans, including Trump on Thursday, have used the threat of Trump's impeachment to energize GOP voters into turning out in the November midterms, Democrats have largely avoided the topic. Instead, many have advocated only that the special counsel Robert Mueller's investigation continue unimpeded.

"If and when the information emerges about that, we'll see," House Minority Leader Nancy Pelosi said in August when asked about the possibility of impeaching Trump.

"It's not a priority on the agenda going forward unless something else comes forward," she said.

Democratic candidates are favored to retake the House but are facing a steeper challenge in the Senate.