The former national security adviser warned this week that candidates who model themselves after the former president could be in danger of political suicide.

He was commenting on a poll that had been done by his organization. The poll asked 1,200 likely voters in Pennsylvania, Ohio, North Carolina, and Georgia if they would vote in the election.

Trump is becoming a drag on the general-election prospects of GOP candidates, according to the data from theBoltonPAC. In particular, the Trump-endorsed Dr. Mehmet Oz and the one running for Congress who is currently lagging in the polls, the PAC pointed out how undecided voters didn't like Trump.

The results don't mean that Republican candidates shouldn't campaign as true conservatives, only that they stress their loyalty to principles.

He said that the candidates need to separate themselves from Trump.

Trump's influence on the nominating process could be fatal to GOP efforts to gain control of the Senate in the upcoming elections.

Trump's fixation on himself and the 2020 election is poisonous to independent and undecided voters, according to a statement by the US ambassador to the UN.

"Republican candidates who hope to win in November are at risk of political suicide if they stress their close ties to Trump or allow their opponents to portray them as mini- Trumps," he said.

There are whispers that Trump's high-profile Senate picks may lose their races despite the Democrats' struggles.

Recent polling shows that John Fetterman has overtaken Oz in his race. In November, Oz and Fetterman will square off to decide who will replace Pat Toomey in Pennsylvania.

The Washington Post reported in April that sources close to Trump were worried about the former president's endorsements.

Trump's post-presidential press office did not respond to questions from Insider.