\begin{table}[htbp] 
\centering 
\caption{\bf Within-Pool Comparisons: NP-Score of State Legislators Who Win Primary or General Elections vs. Others -- Expanded Pool Including Retired State Legislators} 
\label{tbl_main_regressions_win_prim_genl_33_expanded_pool} 
\begin{tabular}{lcccccc} 
\toprule\toprule 
& \multicolumn{3}{c}{Democrats} & \multicolumn{3}{c}{~Republicans} \\ [.05in] 
Sample                 & Coeff.  & Std. Error  &  \# Obs.  & ~~Coeff.  &  Std. Error  &  \# Obs.  \\ [.01in] 
\midrule 
\multicolumn{7}{l}{\textit{Primary Election Winners vs. Others in Pool}} \\ [0.01in] 
All pools              & -0.045 & (0.035) & [2387] & ~~0.109 & (0.026) & [3672] \\ [.01in] 
Safe districts         & -0.030 & (0.031) & [779] & ~~0.182 & (0.035) & [2110] \\ [.01in] 
Competitive districts  & -0.037 & (0.044) & [851] & ~~0.055 & (0.035) & [1311] \\ [.01in] 
\midrule 
\multicolumn{7}{l}{\textit{General Election Winners vs. Others in Pool}} \\ [0.01in] 
All pools              & -0.038 & (0.032) & [1049] & ~~0.134 & (0.038) & [2056] \\ [.01in] 
Safe districts         & -0.025 & (0.033) & [756] & ~~0.194 & (0.040) & [1504] \\ [.01in] 
Competitive districts  & -0.079 & (0.083) & [230] & ~~0.006 & (0.059) & [546] \\ [.01in] 
\bottomrule 
\end{tabular} 
\end{table} 
