As President, Trump Demanded Investigations of Foes. He Often Got Them.

It was the spring of 2018 and President Donald J. Trump, faced with an accelerating inquiry into his campaign’s ties to Russia, was furious that the Justice Department was reluctant to strike back at those he saw as his enemies.

In an Oval Office meeting, Mr. Trump told startled aides that if Attorney General Jeff Sessions would not order the department to go after Hillary Clinton and James B. Comey, the former F.B.I. director, Mr. Trump would prosecute them himself.

Recognizing the extraordinary dangers of a president seeking not just to weaponize the criminal justice system for political ends but trying as well to assume personal control over who should be investigated and charged, the White House counsel, Donald F. McGahn II, sought to stall.

“How about I do this?” Mr. McGahn told Mr. Trump, according to an account verified by witnesses. “I’m going to write you a memo explaining to you what the law is and how it works, and I’ll give that memo to you and you can decide what you want to do.”

The episode marked the start of a more aggressive effort by Mr. Trump to deploy his power against his perceived enemies despite warnings not to do so by top aides. And a look back at the cases of 10 individuals brings a pattern into clearer focus: After Mr. Trump made repeated public or private demands for them to be targeted by the government, they faced federal pressure of one kind or another.

The broad outlines of those episodes have been previously reported. But a closer examination reveals the degree of concern and pushback against Mr. Trump’s demands inside the White House.