WASHINGTON — Republican leaders hope House passage of bills targeting Planned Parenthood and curbing some abortion procedures will mollify fractious conservatives demanding a face-off with President Barack Obama that could trigger a federal shutdown.

The GOP-run chamber was on track to approve the two measures today, despite White House veto threats and opposition from most Democrats. One would block Planned Parenthood’s federal funds for a year. The other would inflict criminal penalties on doctors who don’t try saving infants born alive during abortions.

The bills were a reaction to videos showing Planned Parenthood officials casually describing how they provide researchers with tissue from aborted fetuses. The debate also underscored how the age-old fight over abortion could affect next year’s elections because it touches emotional hotspots among each side’s most loyal partisans and could be pivotal as each party tries wooing female voters.