US President Donald Trump's approval rating has dropped to an all-time low as he completes 200 days of his presidency, a new poll shows.

Only 32 percent of American voters approve of how Trump is performing as president, while 59 percent said they disapproved, the IBD/TIPP survey found on Tuesday. In July, Trump's approval voting was at 37 percent in the same poll.

The poll's director, Raghavan Mayur, said Trump's approval rating has plunged due to a poor performance by the White House on several key issues

The mounting Russia investigation and the failure to repeal Obamacare are all contributing factors to Trump's mounting unpopularity, he added.

Despite Americans' optimism regarding the economy, multiple factors are collectively offsetting the boost that the economy should be giving Trump, and driving down his approval rating, Mayur said.

Trump's skirmish with Attorney General Jeff Sessions did not go well with many conservatives, and former communications director Anthony Scaramucci's vulgar exchange with a reporter upset many. On top of this, the daily dose of insinuations from the media regarding collusion with Russia also help to explain the low approval rating.

The majority of voters said Trump was not honest and 65 percent said they believe his campaign colluded with Moscow in some form. Those numbers include 30 percent of Republicans and 64 percent of independents.

The poll also found that support for Trump among Republicans has dropped to 71 percent, down from 83 percent last month.

Trump's support stand stands at 44 percent, down 7 points since July, among white males, another key Trump demographic.

The latest IBD/TIPP poll was conducted between July 28 to August 5 in which 904 adults across the country participated. The survey has a margin of sampling error of 3.3 percentage points. The survey is part of collaboration between Investor's Business Daily and TechnoMetrica.