Five takeaways on Trump's ouster of John Bolton

President Trump announced Tuesday that John Bolton was leaving his post as national security adviser, citing disagreements between the two over how the administration should tackle key foreign policy challenges.

After the president trumpeted Bolton’s departure on Twitter, shockwaves coursed through the Beltway.

Here are five takeaways from Bolton’s exit.

Trump chaos takes another turn - With Bolton’s ouster, Trump is now searching for his fourth national security adviser in less than three years, reviving concerns about instability among the president’s top advisers as he faces a series...