US President Joe Biden and Vice President Kamala Harris will make their first joint campaign appearance of 2024 (Brendan SMIALOWSKI)US President Joe Biden and Vice President Kamala Harris will push the fight for abortion rights in a series of events this week, highlighting what Democrats believe is political kryptonite for Donald Trump in November's election. Harris is being promoted by the Biden campaign as the face of the reproductive rights issue, delivering a message that if Republican former president Trump makes a comeback, he will seek to impose further restrictions on abortion. "On this day and every day, Vice President Harris and I are fighting to protect women's reproductive freedom against Republican officials' dangerous, extreme, and out-of-touch agenda," Biden said in a statement Monday. Democrats have particularly seized on the issue after Republicans lost a series of votes centered on abortion rights in off-year elections last year in Ohio, Kentucky and Virginia. Democrat campaigners likely would target areas where abortion rights are under threat, as it is not as "broad brush" an issue as migration or crime, Melissa DeRosa, a Democratic strategist, told AFP.