White House aides and congressional allies worked all week to keep President Donald Trump from unloading on the woman who has accused Supreme Court nominee Brett Kavanaugh of sexual misconduct.

But as Kavanaugh's nomination hung in the balance, Trump couldn't contain his frustration any longer and unleashed a direct Twitter attack on the credibility of Christine Blasey Ford, who says Kavanaugh sexually assaulted her decades ago during a high school party.

Friday's tweet landed with a splat in the noxious brew of gender and politics that has taken over a high-stakes confirmation battle playing out against the backdrop of the #MeToo movement. In keeping with Trump's natural instinct to fight back when under attack, as well as his long pattern of defending powerful men against the claims of women, the president's tweet reflected growing anger over all the focus on Ford's accusation.

Trump initially believed he could support his nominee without wading into the specific allegations against Kavanaugh since they did not involve him. But that began to change as Trump watched ongoing coverage of the accusations, particularly on Air Force One TVs tuned into Fox News on his long flight Thursday from Washington to Las Vegas, according to a White House official and a Republican close to the White House. Both spoke on condition of anonymity because they were not authorized to discuss private conversations.