(CNN) As President Donald Trump's former campaign chairman sat in a federal courthouse Wednesday morning awaiting news of his prison sentence on conspiracy charges, Trump tweeted to rehash recently released testimony from one of his frequent targets: former FBI lawyer Lisa Page.

"The just revealed FBI Agent Lisa Page transcripts make the Obama Justice Department look exactly like it was, a broken and corrupt machine," Trump tweeted. "Hopefully, justice will finally be served. Much more to come!"

The President has frequently criticized a series of text messages Page exchanged with another former FBI official, Peter Strzok, where they disparaged the then-presidential candidate. Both Page and Strzok were involved in the FBI's investigation into Hillary Clinton's handling of classified information, as well as the early days of the bureau's probe into Russian interference in the 2016 election and briefly served on the special counsel's team. Strzok was dismissed from Robert Mueller's team once the text messages were uncovered by internal investigations. Page left the team before the text messages were discovered.

Both Page and Strzok no longer work at the FBI -- Page resigned and Strzok was fired . But their high-level roles in two politically charged investigations have made the two FBI veterans central to GOP, and Trump, claims of bias at the highest levels of the bureau.

Here are the facts.

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