Generally speaking, the U.S. Congress, which is comprised of the House and the Senate, is considered anti-choice. The House is the more solid of the two as most anti-choice bills pass easily. The votes in the Senate are usually closer. In the long run, however, neither house has enough votes to override a veto by the President.
Counting votes, even on an issue like abortion, is not always an exact science as there could be circumstances where a pro-choice Member of Congress votes on the anti-choice side, or visa versa. Below we have provided links to the voting charts compiled by NARAL Pro-Choice America and the National Right to Life Committee:
NARAL Pro-Choice America Voting Chart
National Right to Life Committee Voting Charts
House of Representatives: