ALBANY, NY — Sen. Roy McDonald will announce Thursday that he will not push forward with a third-party campaign, two people familiar with this campaign said. One source said McDonald, a two-term Republican incumbent who lost a GOP primary to Saratoga County Clerk Kathy Marchione, made his decision "for the good of the party." He has been largely silent since the Sept. 13 primary, as he weighed whether to push toward the November general election on the Independence Party line, which he secured over the summer. While she always maintained her platform was broader, Marchione's challenge to McDonald was shaped...