The American people's support for President Trump has weakened since the spring as the White House has faced a stalled agenda overshadowed by investigations into Russian meddling, a perceived decline in American leadership worldwide, and struggling GOP efforts to pass a healthcare bill unpopular with the American people.

A new Washington Post-ABC News poll found 58 percent of those surveyed disapprove of Trump's performance in office. The president's approval rating sits at 36 percent, and has steadily declined since April.

Of those who disapprove of Trump's performance, 48 percent said they "disapprove strongly." Neither former President Clinton nor former President Obama reached that level of disapproval from the American people.

Nearly half of all Americans, 48 percent, believe America's leadership in the world has weakened since Trump assumed the presidency in January, and 47 percent do not trust the president to negotiate on America's behalf with other world leaders, including Russian President Vladimir Putin.

Though Trump has derided the investigation into Russian meddling in the 2016 election as "fake news" and a "witch hunt," the majority of the American people — 60 percent — believe Russia attempted to influence the election, and 44 percent think Trump benefited from those attempts.

Nearly 4 in 10 Americans think the president's campaign intentionally helped Russia's efforts to meddling in the election.

When asked about the 2016 meeting Donald Trump Jr., Jared Kushner, and former Trump campaign chairman Paul Manafort had with a Russian lawyer last year with hopes of receiving damaging information on Hillary Clinton, 63 percent said they believe the meeting was inappropriate.

Since the president's inauguration, Republicans have worked on a plan to repeal and replace Obamacare. According to the Washington Post-ABC News poll, 50 percent of those surveyed said they favored Obamacare, with 24 percent preferring the Republican healthcare plan.

Thirteen percent don't want either.

The Washington Post-ABC News poll was conducted between from July 10 to July 13, and 1,001 adults were surveyed over the phone.