A few days before the annual March for Life, a new national poll indicated shifting public attitudes, crossing party labels, in favor of increased restrictions on abortion.

"When you ask Americans what they think of abortion ... you get very, very strong numbers in favor of restrictions," said Andrew Walther, vice president of communications of the Knights of Columbus, during a January 23 news conference live streamed to reporters.

The Marist survey of 2,729 adults was conducted in December and sponsored by the Knights of Columbus. It contains breakdowns by political affiliations and ethnicity but not religious beliefs, so there was no information on how many respondents were Catholics. 52 per cent of the respondents indicated that they thought of themselves as "pro-choice," while 42 per cent self-identified as pro-life. But when the questions became more detailed on abortion policies, the numbers shifted.