Trump’s speech at CPAC was full of falsehoods and exaggerations. Here’s a fact check.

Former President Donald J. Trump, in his first public appearance since leaving the White House, mounted inaccurate attacks against his successor and revived familiar falsehoods in a speech on Sunday at the Conservative Political Action Conference.

Here’s a fact check.

WHAT MR. TRUMP SAID

False. Under Mr. Trump, there were 200,000 apprehensions at the southern border in the 2020 fiscal year; just over 850,000 in 2019; just under 400,000 in 2018; and about 300,000 in 2017. None of those numbers are unprecedented.

The figures for Mr. Trump’s first two years in office were on par with the numbers under President Barack Obama.

WHAT MR. TRUMP SAID

This is misleading/exaggerated. Initial government guidance on mask-wearing was muddled.

The Centers for Disease Control and Prevention said in the early days of the pandemic that it did not recommend that the general public wear masks. Dr. Anthony S. Fauci, the nation’s leading infectious disease specialist, said last March widespread mask usage could lead to shortages for health care workers, but he was “not against” the practice.

By April, Dr. Fauci and the C.D.C. had begun to encourage wearing cloth masks.

WHAT MR. TRUMP SAID

False. The Biden administration ordered a 100-day pause on deportations. It did not apply to “murderers” and everybody. In a memo in February, Immigration and Customs Enforcement said it would “focus the agency’s civil immigration enforcement and removal resources on threats to national security, border security and public safety.”

That would include anyone convicted of an aggravated felony, such as murder.

WHAT MR. TRUMP SAID

False. While no Republican incumbent in the House lost their race to a Democrat, Republican incumbents lost two Senate seats in November while Mr. Trump was a candidate. Martha McSally of Arizona and Cory Gardner of Colorado lost their re-election bids.

OTHER CLAIMS

Mr. Trump repeated many claims The New York Times has previously debunked:

• He claimed that the Keystone XL pipeline created “42,000 great-paying jobs.” (This is an estimate of the temporary jobs the pipeline would support in two years.)

• He falsely blamed “the windmill calamity” for blackouts in Texas, and criticized windmills for killing birds. (Wind power is not the chief reason for the power outages, and birds die far more frequently from collisions with buildings and cars than with windmills.)

• He falsely claimed that there were “more votes than people” in Detroit and Pennsylvania. (This is not true of either location.)