By Pete Schroeder WASHINGTON (Reuters) -Sarah Bloom Raskin ended her bid to become the top bank regulator at the Federal Reserve on Tuesday, one day after Democratic Senator Joe Manchin said he would not support her, citing worries she would discourage banks from lending to oil and gas companies. With Raskin informing President Joe Biden she was withdrawing her name from consideration, according to a source familiar with the matter, the administration is now on the hunt for a possible replacement. Here are the candidates likely to be in the mix, according to analysts and Washington insiders. R…