Washington CNN  — 

A full year after the 2020 presidential election, new details are still emerging about former President Donald Trump’s unprecedented effort to overturn the results.

Many of Trump’s actions were done in public view, including dozens of ill-fated lawsuits and tweets that undermined the electoral process. But congressional inquiries and news reports have shed new light on what happened behind the scenes as Trump tried to cling to power.

Perhaps the most disturbing aspect of Trump’s attempted coup was how he relentlessly tried to weaponize the Justice Department to nullify President Joe Biden’s victory. The Democratic-run Senate Judiciary Committee investigated Trump’s conduct and concluded in a recent report that he “grossly abused the power of the presidency.”

Here’s a big-picture breakdown of the attempted coup, along with a day-by-day timeline of Trump’s efforts to co-opt the Justice Department to help his campaign.

Big-picture summary of the coup attempt

Four days after Election Day, CNN and other news outlets projected that Biden had won. Instead of conceding, Trump immediately started pressuring local, state and federal officials to overturn the results. Many of these officials rebuffed his demands, concluding they were unethical, illegal or unconstitutional. But some officials and advisers joined the charge and tried to help.

Within weeks, Trump met with and spoke to officials from Michigan and Pennsylvania who were involved in the election process, hoping they’d block Biden’s victory. He fired a senior cybersecurity official at the Department of Homeland Security who publicly debunked his lies about voter fraud. And he cranked up the pressure on the Justice Department, even after Attorney General Bill Barr ordered prosecutors to investigate voter fraud allegations.

He tried – but failed – to stop certification in key states in late November and December. After that, Trump and his allies filed meritless lawsuits across the country seeking to nullify the results.

Trump called Pennsylvania lawmakers, urging them to ignore the fact that Biden won their state and appoint GOP electors instead. He called Georgia’s governor and pushed him to convince state