Next month's presidential primary in Texas is critical for Sen. Hillary Clinton's floundering campaign, but the New York senator may have scored some points from an unlikely Texas politician. Kirk Watson, a Texas state senator and Sen. Barack Obama supporter, was stumped this week when Hardball host Chris Matthews asked him to name Obama's legislative accomplishments. Watson addressed the gaffe on his blog yesterday. "I expected to be asked about the primary that night, or the big one coming up ...