The prosecution’s prized turncoat witness at the bribery trial of U.S. Sen. Bob Menendez was politely combative Tuesday as defense lawyers tried to poke holes in his testimony and portray him as a habitual liar. Jose Uribe spent a third day on the witness stand, a day after telling the jury that Menendez, a Democrat, took credit in 2020 for preventing New Jersey state investigations from affecting his insurance business. Prosecutors say Menendez used his power as a senator to help three New Jersey businessmen for five years beginning in 2018 in return for bribes of gold bars, hundreds of thous…