A super PAC supporting Marco Rubio’s presidential campaign raised $2.5 million in January, including $1 million from tech billionaire Larry Ellison, according to a report filed Saturday with the Federal Election Commission. The donation from Ellison, the executive chairman of Oracle Corporation, brings his total spending on behalf of Rubio to $4 million, making him among the top donors of the 2016 cycle. Conservative Solutions PAC spent nearly $11 million last month, mostly on ads and direct mail attacking Rubio’s rival for the Republican presidential nomination Ted Cruz and his former rival Chris Christie, who has since dropped out. The...