\begin{table}[htbp] 
\centering 
\caption{\bf Within-pool comparisons: NP-Score of state legislators who win primary or general elections vs. others.} 
\label{tbl_main_regressions_win_prim_genl_33} 
\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              & -0.032 & (0.029) & [2379] & ~~0.108 & (0.023) & [3488] \\ [.01in] 
Safe districts         & -0.043 & (0.032) & [904] & ~~0.164 & (0.034) & [2014] \\ [.01in] 
Competitive districts  & -0.022 & (0.047) & [789] & ~~0.065 & (0.031) & [1104] \\ [.01in] 
\midrule 
\multicolumn{7}{l}{\textit{General Election Winners vs. Others in Pool}} \\ [0.01in] 
All pools              & -0.039 & (0.029) & [1184] & ~~0.136 & (0.034) & [1921] \\ [.01in] 
Safe districts         & -0.045 & (0.032) & [878] & ~~0.170 & (0.039) & [1467] \\ [.01in] 
Competitive districts  & -0.034 & (0.074) & [252] & ~~0.043 & (0.051) & [448] \\ [.01in] 
\bottomrule 
\end{tabular} 
\end{table} 
