Republican Rep. Chris Jacobs of New York announced Friday he will not run again for Congress, after he lost the support of conservatives following comments that he would support a ban of AR-15s and raising the age of gun ownership to 21.Republican Rep. Chris Jacobs of New York announced Friday he will not run again for Congress, after he lost the support of conservatives following comments that he would support a ban of AR-15s and raising the age of gun ownership to 21.