Oregon's 1990 U.S. Senate election
... that in Oregon's 1990 U.S. Senate election, incumbent Mark Hatfield's opponent in the Republican primary was best known for having spent 40 days tree sitting to protest old-growth logging?
... that in <b id="mwDfU"><a class="mw-redirect" href="./United_States_Senate_election_in_Oregon,_1990" id="mwDfY" rel="mw:WikiLink" title="United States Senate election in Oregon, 1990">Oregon's 1990 U.S. Senate election</a></b>, incumbent <a href="./Mark_Hatfield" id="mwDfc" rel="mw:WikiLink" title="Mark Hatfield">Mark Hatfield</a>'s opponent in the <a href="./Republican_Party_(United_States)" id="mwDfg" rel="mw:WikiLink" title="Republican Party (United States)">Republican</a> <a href="./Primary_election" id="mwDfk" rel="mw:WikiLink" title="Primary election">primary</a> was best known for having spent 40 days <a href="./Tree_sitting" id="mwDfo" rel="mw:WikiLink" title="Tree sitting">tree sitting</a> to protest <a href="./Old-growth_forest" id="mwDfs" rel="mw:WikiLink" title="Old-growth forest">old-growth</a> logging?