Below is the political opportunity available to environmental organizations during the period 1961-1968. Based upon the conditions reflected in this information, environmental organizations should employ which of the following strategies to maximize their influence over environmental policy?

For the sake of identifying a single strategy, the legislative branch is more influential than the executive branch.

House of Representatives Senate Government is: Year President Party Congress Democrats Republicans Other % Control Democrats Republican Other % Control Unified/Divide 1961-62 Kennedy D 87th 263 174 0 60% 64 36 0 64% unified 1963-64 Kennedy/Johnson D 88th 258 176 59% 67 33 67% unified 1965-66 Johnson D 89th 295 140 0 68% 68 32 68% unified 1967-68 Johnson D 90th 248 187 0 57% 64 36 0 64% unified