Senator Robert Menendez of New Jersey, who was indicted in April on corruption charges, raised nearly $1.6 million for his legal defense fund in the second quarter of the year, including from some of the country’s most prominent pro-Israel billionaires, according to a disclosure report filed this week.

Though Mr. Menendez is a Democrat, his legal fund has attracted support from political donors in both parties who take a hawkish view of Israel’s security.