Responding to constituents at her regularly scheduled “office hours” last week, Massachusetts senator and celebrated left-wing icon Elizabeth Warren defended her vote to send $225 million of American taxpayer money to Israel for its Iron Dome missile defense system...

ok. that's the closest thing i can get, but if you support the iron dome system, you can't be too opposed to missile defense, as that is what israel is doing with it - testing systems for the empire's eventual use. 

and, if you're not opposed to missile defense then you don't oppose building first strike capability, because that's what it's actually about.

but, i'd like to see a clearer statement.