Democrats have loathed John Bolton for years. Now, he could be their star witness against Trump.

AP Photo/Alex Brandon

• Democrats have long loathed former national security adviser John Bolton, but he could be their most dangerous witness against President Donald Trump in Congress' impeachment inquiry.
• Bolton attended a July 10 White House meeting with Ukrainian officials during which one of Trump's allies explicitly raised the subject of a quid pro quo with Ukraine.
• He was staunchly opposed to Trump's infamous July 25 phone call with Ukraine's president because he feared Trump would use it to air his personal grievances and push for politically motivated investigations.
• Bolton's lawyer dropped a tantalizing hint in a letter to Congress earlier this month indicating that Bolton knows even more than what's already been revealed.
• Most importantly, Bolton has receipts. He's a prolific note-taker and his documents could prove devastating to a White House swimming through a mountain of evidence Democrats have collected.
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For Democrats, it couldn't get worse than John Bolton.

In 2018, he became the latest national security adviser to come through the revolving door of the Trump administration, which has seen more turnover than any other administration in recent history.

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