WASHINGTON – A tenacious Hillary Rodham Clinton pushed ahead with her White House bid Wednesday, revealing that she lent her cash-strapped campaign $6.4 million while vowing to seek the nomination at the ballot box and through Democratic Party channels.

Clinton met with fresh pressure to bow out of the race. Former Sen. George McGovern, the 1972 Democratic presidential nominee who had backed her candidacy, urged her to get out on Wednesday and said he had decided to endorse Barack Obama.