More on Caroline Kennedy ALBANY, N.Y. — Democratic insiders say the selection of Rep. Kirsten Gillibrand to fill New York's vacant U.S. Senate seat showed the pivotal influence of senior Sen. Charles Schumer. Gov. David Paterson selected the little-known congresswoman over candidates Caroline Kennedy, backed by President Barack Obama and New York City Mayor Michael Bloomberg, and Andrew Cuomo, backed by Hillary Rodham Clinton and former President Bill Clinton. But at the news conference introducing Paterson's choice Friday, one big smile gave it all away, and it was on the Schumer's face. "Schumer was pushing her, he was really pushing," said a Democrat on Saturday who was told by Paterson that Schumer favored Gillibrand.