I posted a good summary of Mayor Pete's views here on the thread on him.

For Booker, I see in this Dec. 2018 NJ.com. article that while he supported Obama's Iran bill he also was one of the rare Dem anti-BDS voters and even put his name on the anti-BDS bill as a supporter:

he added his name to legislation to ban U.S. companies from joining an international boycott of Israel. 

In fact, Booker, D-N.J., is the only U.S. senator mentioned as a prospective 2020 Democratic presidential candidate to co-sponsor the bill. In all, just 14 of 49 Democrats (including U.S. Sen. Robert Menendez, D-N.J., who broke with his party and opposed the Iran deal) joined 42 of 51 Republicans in supporting the measure. A similar House bill is backed by 293 of 435 representatives, though not Rep. Beto O’Rourke, D-Texas, who also is mentioned in conversations about 2020.

The legislation is designed to oppose the Palestinian-led boycott, divestiture and sanctions movement, better known as BDS. While saying its actions are designed to “pressure Israel to comply with international law,” the group does not specifically support Israel’s right to exist and backs policies that would end its unique status as a country with a Jewish majority.

“We’ve seen the alarming rise in anti-Semitism in the United States and across the world in recent years manifest itself in many deeply concerning ways, including in the actions of foreign governments targeting Israel and the Israeli people,” Booker, D-N.J., said in announcing his support for the anti-BDS measure.