New Alzheimer's blood test and the passing of Dr. Martin Luther King Jr.'s son

Nikki Haley appears poised for a one-on-one matchup with former President Donald Trump in Tuesday’s GOP primary in New Hampshire. A judge in E. Jean Carroll’s defamation case against Trump is weighing whether to let him testify this week. The families of hostages held by Hamas in Gaza disrupted an Israeli parliament meeting. Researchers say some blood tests could be used to screen for Alzheimer’s disease in the future. And, tributes are pouring in following the death of Dr. Martin Luther King Jr.’s youngest son, Dexter Scott King.

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