Senate musical chairs: California prepares for political battle over Feinstein vacancy

An avalanche' of candidates, including Katie Porter, Barbara Lee and Adam Schiff, announce candidacy for California seat

Dianne Feinstein, the 89-year-old who served as California senator for three decades, has yet to announce her retirement. But the contest to succeed her in two years is already shaping into a bitter battle.

After months of shadow campaigning and whispered political leveraging, earlier this month, Katie Porter - the whiteboard-wielding progressive congresswoman - became the first to officially declare her candidacy. Barbara Lee, the old-school leftist with an ardent antiwar record, has reportedly told colleagues she is running. Adam Schiff, icon of the anti-Trump liberal resistance, has reportedly begun prepping for a run. Silicon valley congressman Ro Khanna is expected to jump in as well.